AKT, 22 LITTLE KNOWN DIPTERA ALDRICH 1 3 



SYNORIS COQUILLETTI. new species 



Hypostena pedestris Walker of Coquillett, Revision N. A. Tachinidae, 1897, p. 61, 



Male. — Front at narrowest measuring 0,21, 0.24, 0.25, and 0,25 of 

 the head width in the four specimens. Parafrontals with gray pollen 

 becoming more white on the parafacial which is narrower than third 

 antennal joint; cheek one-third the eye height; ocellar bristles small, 

 proclinate; frontal stripe reddish brown; frontal bristles 8 or 9, the 

 two uppermost reclinate, the second largest. Antennae yellow to the 

 arista, the third joint infuscated for the remainder of its length except 

 underneath near the base. Palpi and proboscis yellow. Mesonoumt 

 with dense gray pollen with faint stripes, Scutelium broadly yellow 

 at tip. Pleurae partly yellow in ground color; calypters with a white 

 margin, the disk slightly infuscated. 



Abdomen decidedly pointed with more or less of reddish-brown 

 color at the sides near the base; the pollen is very uniformly placed, 

 covering the whole abdomen except a little on the venter. The ab- 

 dominal hairs are mostly placed on small bare spots. First segment 

 with a pair of median marginals, one large marginal at the side and 

 several smaller bristles before the latter; second segment with one dis- 

 cal and one median marginal pair, at the side with one discal and one 

 marginal; third segment with one discal and a marginal row of 10 as 

 well as one conspicuous discal at the side; fourth segment with discal 

 and marginal bristles irregularly arranged, al)out 18 in all. Venter 

 yellow in ground color. Genitalia small, yellow, retracted. 



Legs entirely yellow, the tarsi on account of numerous ')Iack hairs 

 appearing more brown; claws and pulvilli elongated; middle tibia 

 with one bristle on outer front side and a much smaller one close 

 above it; hind tibia with an irregular row on the outer side in the 

 middle of which is one longer bristle, on the inner hind side a large 

 bristle, and a smaller halfway between this and the base. 



Wings grayish hyaline, the fourth vein with an oblique curve at 

 the bend, thence nearly straight to the tip. 



Length, 7 to 8.2 mm. 



Described from, four males, tliree of which, including the type, 

 were collected by D. W. Coquillett in Los Angeles County, California, 

 the other collected by Prof. T. D. A. Cockerell at Beulah, New Mex- 

 ico, July 15. The last specimen is the largest and has the narrowest 

 front. It also has a broader yellow spot on each side of the abdo- 

 men. 



Type.— Cat. No. 28910, U.S.N.M. 



According to the notes of Major Austen,^ Walker's Dexia pedestris 

 is an entirely different species, having the parafacials hairy, and 

 evidently belongs to the genus Cryptomeigenia. 



8 Annals and Magazine of Natural History, vol. 19, 1607, p. 345. 

 3100—26 3 



