﻿June, 1895] COQUILLETT. DESCRIPTIONS OF TaCHINID/E. 55 



broad. Thorax gray pollinose, marked with four black vittie, three post sutural ma- 

 crochjetce; scutellum bearing three long lateral and a minute apical pair. Abdomen 

 shining, narrow bases of last three segments white pollinose; first segment with a 

 marginal pair of macrocha;ta;, second with a discal and marginal pair, third with a 

 discal pair and a marginal row of ten, the fourth with a discal and sub-marginal row 

 of eight each. Hind tibire sub-ciliate, claws and pulvilli much shorter than the last 

 tarsal joint, front tarsi noticably broader than the middle ones. Wings grayish hya- 

 line, third vein bearing a few bristles at the base, the others bare, apical cell open or 

 closed in the margin almost at the wing-tip, hind crossvein nearly midway between 

 the small crossvein and the bend, the latter arcuate. 



$ Same as the 9 with these exceptions: Third joint of antennae seven 

 times as long as the second, arista thickened on the basal four-fifths, the penultimate 

 joint over twice as long as broad, front tarsi only slightly wider than the middle ones. 

 Length 5 to 8 mm. 



Dist. Columbia. One male and five females, two of which were 

 collected by Mr. Th. Pergande, for whom the species is named. 



Admontia nasoni, sp. nov. 



9 — Differs from the above description oi pergandei on\y as follows: Palpi, basal 

 half of arista and extreme base of third antennal joint, yellowish. Front at vertex 

 one-half broader than either eye, frontal bristles descending only to base of second 

 antennal joint. Wings whitish at base, dark brown beyond the small crossvein, the 

 portion behind the fifth vein, and behind the last section of the fourth vein, hyaline 

 a hyaline spot in apices of submarginal, first posterior and of the discal cell ; only 

 one bristle at base of third vein. Length 7 mm. 



Illinois. A single specimen from Dr. W. A. Nason, after whom 

 this handsome species is named. 



Pseudomyothyria tortricis, sp. nov. 



$ — Head black, front at vertex one-third broader than either eye, vitta next 

 the antennae three-fourths as wide as either side of front, frontal bristles descending 

 to base of third antennal joint, two pairs of orbital bristles ; face in profile slightly 

 convex, the sides bare; ridges bristly to slightly above the middle, cheeks one-third as 

 broad as the eye-height. Antenna; black, nearly as long as the face, third joint slightly 

 over three times as long as the second, slightly widening to the apex; arista thickened on 

 basal third, penultimate joint shorter than broad. Proboscis black, last section not 

 half as long as height of head, palpi yellow. Thorax and scutellum black, whitish 

 pollinose, thorax with indications of four black vitta:, three post sutural macrochaetoe ; 

 scutellum bearing three long lateral and a very small apical pair of macrochcetK. 

 Abdomens shining black, bases of last three segments white pollinose; first segment 

 destitute of dorsal macrochastse, second with a discal and marginal pair, third with a 

 discal pair and n arginal row of ten, the fourth with a discal row of ten and a sub- 

 marginal row of six. Legs black, claws and pulvilli shorter than the last tarsal 

 joint. Wings hyaline, third vein with a few bristles at base, the others bare, petiole 

 of apical cell nearly half as l&ng as the hind crossvein. Length 5.5 mm. 



