W. L. Brown, Jr.
Interesting Northern Records for Eastern Hymenoptera (Formicidae and Embolemidae).
Psyche 59(1):12, 1952.

This article at Hindawi Publishing: https://doi.org/10.1155/1952/83653
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12 Psyche [March
describes M. trinitatis as being broader than M. pretiosus, so M. costaricemis is a more slender beetle than either of them.
INTERESTING NORTHERN RECORDS FOR EASTERN HYMENOP- TERA (FORMICIDAE AND EMBOLEMIDAE) . - On May 3, 1952, a mild, sunny day, Dr. W. L. Nutting, Dr. I?. G. Werner and myself spent an afternoon collecting on Horn Pond Hill, near Winchester and Woburn, Massachusetts. This glaciated hill, low and largely denuded of its forest cover, bears many stones loosely set in the soil and provid- ing excellent ant collecting. Under a large stone covering a nest of Formica fusca L., Werner discovered foraging workers of Smithistruma ( Wessonistruma) pergandei (Emery) ; the nest of this ant was found under an adjoin- ing rock. We secured most (perhaps 90%) of the popula- tion, which seemed unusually large for a dacetine nest, and a count yielded a total of 648 workers and 3 females (deal- ate queens). This is the largest population recorded for the nest of any dacetine species, and is more than twice the usual maximums recorded previously for this and other species.
Previous northern records for S. pergandei are from nearby Boston and Cambridge, only a few miles farther south.
Beneath the rock covering the S. pergandei nest, but to one side, were found three workers of Proceratium silaceum Roger, of which the northeastern limit has been considered to rest in southern New York.
Under another rock overturned by Werner was found a female of the curious embolemid wasp, Embolemus neurcti- cas (Brues) , previously known from Massachusetts (Stony Brook Reservation) and New York. This specimen is very similar to the types in the Museum of Comparative Zoology, but is darker and more brownish in color. It was found crawling on the under side of the rock. It is interesting to note that all the records for this insect are dated in May. The host is unknown. - W. L. BROWN, JR., Museum of Com- parative Zoology, Harvard University.




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