ART, 22 LITTLE KNOWN DIPTEKA ALDRICH 6 



uniform hairs arranged in rather irregular rows, there being about 

 10 rows between the dorsocentrals. The scutellum is bare and flat. 

 Wing as in Neopliyllomyza; the auxiliary vein rudimentary, the first 

 vein very short, costa slightly broken in two places before the first 

 vein; second, third, and fourth veins parallel and ending in the apex; 

 last section of fourth vein about two and a half times the preceding; 

 second basal cell separated by a cross vein from the discal; anal cell 

 very indistinct. 



Type of genus. — Microsimus luteus, new species. 



MICROSIMUS LUTEUS, new species 



Female. — Color wholly luteous, including antennae, palpi, probos- 

 cis, halteres, and legs. Wing subhyaline with yellow veins. Legs 

 with numerous brownish bristly hairs, the middle tibia with a long 

 apical spine. 



Male. — Somewhat darker in color, the front being brown, the 

 thorax, abdomen, and legs brownish yellow. In the male the wing 

 has a striking long fringe of hairs beginning before the apex and 

 extending around the hind margin; these hairs are nearly as long as 

 the hind cross vein. 



Length, female 2.2-2.4 mm., male 2 mm. 



Described from four females (including type) and one male (allo- 

 type) collected by Dr. William M. Mann in 1921 and 1922 while on 

 the Mulford Biological Exploration. Three females, including the 

 type, and one male were taken at Isiamas, Bolivia, in December, 

 1921, from the nest of the ant Creraatog aster stolli; one additional 

 female was taken at Rurrenabaque, Beni, Bohvia. 



Type.— Cat. No. 28927, U.S.N.M. 



Family TRYPETIDAE 



Genus PELMATOPS Enderlein 



Pdmatops Enderlein, Zool. Jahrbiicher, vol. 33, 1912, p. 355. 



PELMATOPS ICHNEUMONEA Westwood 



Achias ichneumoneus Westwood, Trans. Ent. Sec. Lend., vol. 5, 1850, p. 235, pi. 



23, figs. 8, a, b, c, d. — Osten Sacken, Ann. Mus. Genoa, vol. 16, 1881, p. 74. 

 Pelmatops ichneianonea'ENDERhEiN, Zoo\. Jahvh., vol. 33, 1912, p. 355. — Hendel, 



Wien, Ent. Ztg., vol. 33, 1914, p. 74; Abhandl. Zool. Bot. Ges. Wien, vol. 8, 



1914, Heft 1, p. 219. 



Tliis is the type species of Pelmatops, and the only one at present 

 known to belong to it; it was originally described from a male and 

 a female in the Saunders collection, and a male in that of Westwood. 

 No other specimens have ever been reported, as far as I know, and 

 the references above are all in the nature of comments on West- 

 wood's figures; even the estabhshment of the genus is no exception. 



