A. A. Girault.
The North American Species of Pachyneuron with Three New Species (Chalcid-Flies).
Psyche 24(3):88-90, 1917.

This article at Hindawi Publishing: https://doi.org/10.1155/1917/64341
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88 Pqche [June
On comparison of these loose leaves with the copy of Oliver in the Library of the Bureau of Entomology the Hentz illustrations prove to be very faithful copies, a little lighter in color as a rule, but with the added effort in some cases of indicating high lights on dark species, which improved their general appearance as com- pared with the copy of the printed work in Washington. In a few cases the colors are not con~pletely worked in. In the copies of the descriptions useless words are omitted. For
example, should the original read, "Les antennes sont noires," Mrs. Hentz would simply write "Antennes noires." But no useful descriptive word is omitted. The enormous amount of copying that Harris, Fitch and other early entomologists had to do in the absence of funds for the purchase of rare works is a matter of frequent record. It is doubtful, however, if there exists a more perfect and useful manuscript than the one just described. It will be extremely useful, even today, since it brings together in compact form only the North American species described and figured by Olivier. It will be deposited either in the Library of the United States National Museum or in that of the Bureau of Entomology, where it may be consulted.
THE NORTH AMERICAN SPECIES OF PACHYNEUR ON WITH THREE NEW SPECIES (CHALCID-FLIES).
BY A. A. GXRAULT,
Bureau of Entomology, Washington, D. C.
Based on the types (except albutiu8). Females. I. Legs yellow except the cox= (compare anthomyicz). Scapeblackish. (Is a Dibrachys.)
nigrocganeum Norton
Scape yellqw. As in anthomyie (of which it is a prob- able variant). Median carina of propodeum some- times single (the abdominal petiole not strongly striate). ( = syrphi Ashmead) ( = 8yrphicola Ash- mead.) . . . . . . . . . . . . . . . . . . . . . . . . . . albutius Walker 11. Legs with at least the cox= and femora conco1orous or the latter darkened.
Spiracular sulcus narrow, distinct, no
Pswhe 24:8%9D ( 1917). hup Ytpsycht enlclub orgt.2424-088 htd



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19171 Girault-North An~erican Species oj Pachyneuron 89 lateral carina. Mandibles 4 = dentate. Clypeal pro- jection with a tooth on each side of its base. Abdominal petiole over twice longer than wide, scaly. Neck of propodeum conspicuous; clypeus with its projection with a concave distal margin. Cox* and femora submetallic. Scape yellow. Median carina of propodeum obsolete . . . . . altiscutu Howard Abdominal petiole only a little longer than wide. . Clypeal projection truncate or subtruncate. Cox= metallic, femora washed with metallic. Scape pale.
Propodeum with a more or less complete (paired and diverging) median carina which is somewhat like a ruga and rather delicate, variable. Funicle joints all short, somewhat variable. Abdominal petiole scaly. ( = allogruptce Ashm.)
anthomyi~ Howard
The same. Propodeum with single median and lateral carin*, the lattef more or less obscure and paired at base; petiole with strong longitudinal strik. Scutellum with a distinct cross-suture before apex.
Segment 2 of abdomen caudad at
meson faintly emarginate . . . . hammari Crawford The same but scutellum without a distinct cross- suture before apex (only a faint obscure ridge in its place as in other species), segment 2 of abdomen is sharply minutely incised caudad at meson (as in the other species), the spiracular sulcus is twice broader while the median and lateral carin* of the propodeum are more delicate
virginicum sp. nov.
Scape with the distal half metallic.
The same as hammari but the cross-suture of the scutellum is indicated by coarser punctures, distad of its site, the caudal margin of segment 2 of the abdomen is convex, entire, the median carina of the propodeum is represented by several interlac- ing, delicate rug* broadly across the meson while



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Psyche [June
the tiiiiie are dark except at each end or reddish brown. ..................... .texanum sp. nov. Scape wholly metallic except at the extreme base of its body; the bulla metallic.
Propodeum as in Propachyneuronia siphonophorce Ashmead (plane with a neck and spiracular sulcus) .
Scutellum with no indication of a cross- suture; segment 2 of abdomen slightly eniarginate at meson caudad, convex there. Petiole sub- quadrate, finely scaly. Funicle 1 somewhat the smallest. ................. cali~ornicum sp. nov. Pachyneuron virginicum Girault .
Female: Like hammeri Crawford except as pointed out above. The male is the same except that the funicle joints are considerably longer, 1 twice longer than wide.
From a pair reared from wingless, viviparous females of Aphis sorbi Kaltenbach on apple. Blacksburg, Virginia, August, 1915 (M. T. Smulyan).
Types: Catalogue No. 20368, U. S. N. lM., the pair on tags, the male head and caudal tibia on a slide.
Pachyneuron texanum Girault .
The types are three females reared at College Station, Texas, in February, 1891, from wheat (F. M. Webster). Catalogue No.
20369, U. S. N. M., the examples on tags, a head and a caudal tibia on a slide.
Pachyneuron californicum Girault .
The males have the legs white except the cox% and the proximal half of the caudal femur; the scape is nearly wholly whitish, the funicle more hairy, with joints 1-2 subequal and over twice longer than wide. The types and cotypes are three pairs on tags with a slide bearing a female head and caudal leg. Mt. Antonio, Calif., 6,000 feet, July 20, 1911, and Carpenteria, Calif., L4ugust 17, 1911 (P. H. Timberlake).
Catalogue No. 20370, U. S. N. M., two pairs on tags (Mt. Antonio) and the slide.




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