A. P. Jacot.
New Oribatoid Mites.
Psyche 35(4):213-215, 1928.

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New Oribatoid Mites
NEW ORIBATOID MITES
BY ARTHUR PATJL JACOT.
Shantung Christian University
In working over various collections and a revision of the Phthiracaridae of the northeastern states, the following forms wore found to be undescribed:
Indotritia subgen. nov. (Euphthiracarus) Related to genera Tritia, Euphthiracarus, A~rot~ritia, Ori- botritia, but with bristles of aspis very short, the posterior ones closer to each other than to pseudostigmata and between them, median bristles near edge of aspis and close to pseudostigmata, lateral carina usually well developed; abdomen usually rounded (barely pointed) behind; anal plates with long median blades, usually with bristle at their base; lateral plates with at least two pairs of anterior bristles and three pairs of posterior bristles. Type:-Tritia krakafauensis Sellnick (Treubia, vol. 5 (1924), pp. 372-373, figs. 1-3).
E. (Indotritia) bryani sp. n.
Aspis from side with postero-median depression, lateral carina not strongly developed; pseudostigmatic organ rat.her short, blade-like; abdomen similar to that of type, bristles short; venter rather broad, lateral plates with two pairs of an- terior bristles and three pairs of posterior bristles, anal plates with basal bristles only.
Type locality:-"Wilkes Id.," Wake Island, under stones; Aug. 2,
1923; coll. by E. H. Bryan, (Tanager Expedition), about 24 adults, no. BBM07T1 and BBM07T2. Cotypes in
Bernice Bishop Museum, Honolulu and Museum of Comparative Zoology respectively.




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Psyche
E. (Indotritia) hawaiiensis sp. n.
[December
Aspis with median carina, lateral carina distinct; pseudo- stigmatic organ very short and fine; abdomen similar to that of 2'. javensis Sellnick (1925), bristles rat'her long and stout; lateral plates with two pairs of anterior bristles, anal plates wit,h two pa,irs of bristles.
Type locality :-Kaala Mts., Oahu; April 1892; coll. by R,. C. L. Perkins, 5 adults, no. BBM18P. Cotypes in Bernice Bishop Museum.
Galumna swezeyi sp. 11.
Large (. 75 x .95 mm.) lamellae thick; rostra1 brist'les close to edge of larnellae, long, faint,ly barbed on outer edge; lamellar bristles very much included, long, tips almost meeting, stmngly barbed; interlamellar brist,les long, stout; pseudostigmatic organs short, with oval to obovate head; pteromorphal groove partially filled by an area porosa; are% porosae mesonoticse large, round- oval, far down on sides; median pore large; paramesial bristles midway between apertures. Color amber yellow. Type locality :-Kuliouou, Oahu; March 5, 1920; coll. by 0 13. Swezey, 2 specimens, nos. SPES11S1 and SPESllS2. Co- types at Sugar Plant,ers7 Experiment Stat'ion, Honolulu and Mu- seum of Corn parat,ive Zoology.
II. FROM THE STATER OF CONNECTICUT AND NEW YORK, Phthiracarus olivaceus sp. n.
Size fairly large (abdomen .42 x .63 mrn.); aspis anteriorly depressed, posteriorly flattened, median bristles between pseudo- stigmata, posterior bristles inserted beneath abdomen rim; pseudostigmatic organ rod-like, distal end resembling flower stigma, only slightly dilated; abdomen somewhat long-oval, broadest behind center, posteriorly depressed, bristles heavy, of same caliber throughout, six pairs in median row ventral bristles at suture, t'he posterior pair remote from each other; anal plates nearly as wide as genital, anterior lapets well developed, bristles: two marginal, three "median"; genital plates dove-tailing ato posterior end, bristles; one anterior marginal, four median; color olivaceous, texture sanded.




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New Oribatoid Mites 215
Type locality:-orchard, one mile west of East Village, Mon- roe, Conn.; lower face of old rail, soft moist spot; Aug. 22, 1927; coll. by the writer, 33 specimens, no. 2527h2. Cotypes:-M. C. Z. Phthiracarus setosellus sp. n.
Size somewhat small (. 34 x .54 mm.); aspis anteriorly de- pressed, posteriorly flattened,
posterior bristles near median;
pseudostigmatic organ short, scalpel-or lancet-like; abdomen rather elongate, oval, widest at center, bristles long, tapering, fine, five pairs in median row; ventral bristles at suture, the posterior pair remote from each other; anal plates as wide as as posterior end of genital plates, median bristles more lateral than in preceding; genital plate bristles: two marginal, five median, the posterior-most marginal; color pale tan; texture sanded.
Type locality :-Glen Cove, Long Is ., N. Y.; from rotten wood and under bark slabs; May 8, 1920; coll. by writer, 5 specimens, no. 209h. Cotypes:-M. C. Z.
Achipteria oudemansi sp. n.
Size rather large; .34 x .64 mm., thus extremely slender; lamellae with inner distal angle more anterior than outer, as seen from above elongate ovate i. e. anterior half wider than posterior half; base of lamellar bristles close to end of lamellee; noto- easier extremely pinched together between lamellae forming an acute angle and extending far in between them; interlamellar bristles opposite end of notogaster and inserted on the lamellae; pseudostigmatic organ long, slenderly clavate, extending far be- yond sides of pteromorphac which are drawn out into long, slender horns, their ends turned inward almost touching the la- mellae; anterior end of camerostome pointed or carinate; an- terior ventral angle of pteromorphse drawn out into a sharp corner; anal covers the diameter of one of them distant from posterior edge of ventral plate.
Type locality:-Les Passes. St. Croix, Vaud: moss, near a wall; Aug. 10, 1927; coll. by Mr. Auguste D. Jacot, 6 specimens, no. 270301~. Cotypes in the writer's collection.



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