390 S. W. Williston — NortJi American Conopidce. 



1. — Third joint of the anteunte distinctly shorter than the second. 2. 

 Third joint of anteiiniu nearly or quite as long as the second; 

 brown of anterior portion of the wings with distinct ontlines.3. 

 2, — Wings blackish in front, snb-hyaline behind, picture indistinct ; 

 black species. brachyrhynehus. 



Picture of wings distinct; front yellow; red species. fronto. 

 3. — Attenuated portion of antennal style short, proboscis short ; 

 a hyaline cross-band before the tip of the wing ; shining 

 black, dust grayish, front blackish or black. sylvosus. 



Attenuated portion of style long; proboscis considerably longer 

 than the head ; the brown not interrupted before the tip of 

 the wing. 4. 



4, — Stripe of dust on upper half of pleurae indistinct or without 

 distinct borders. Front black, cheeks brown behind ; probos- 

 cis about once and a half the length of the head. Dark col- 

 ored species, bulbirostris. 

 Stripe of dust on upper half of pleurie as sharply detined as on 

 the under half. 5. 

 5. — Proboscis twice the length of head, stripe on upper half of 

 pleurse narrow. Reddish species. excisus. 

 Proboscis scarcely once and a half the length of the head ; 

 pleural stripe not narrowed above ; face, cheeks and under 

 part of front pale yellow. 6. 

 6. — Facial grooves with a black spot on each side of the middle. 

 Black species. xanthopareus. 

 Facial grooves wholly yellow. Red species. gracilis. 



brachyrhynehus Macquart, Dipt. Exot., ii, •<, 15, 13, tab. i, 



fig. 8; Williston, these Trans., iv, 341 (x-eproduction of the 



original). — Va., S, C, Ga., Mass., Kans. 

 Conops obscuripen7iis Williston, these Trans., iv, 328. 

 fronto Williston, these Trans., ante, p. 378. 

 sylvosus Williston, these Trans., iv, 329. — Mass., Conn., Kans. 

 excisus Wiedemann, Auss. Zw. Ins., ii, 234 ; Loew, Neue Beitr., etc., 



i, 28 ; Williston, these Trans., iv, 330. — Ga., Fla., N. C. 

 Conops sugens Wiedemann, Auss. Zw. Ins., ii, 236, 3. 

 bulbirostris Loew, Neue Beitr. etc., i, 30 ; Williston, these Trans., 



IV, 331.— Ga., N. 0. 

 xanthopareus Williston, these Trans., iv, 332. — Conn, 

 gracilis Williston, these Trans., ante, p. 3'7'7. 



Unrecognized species of doubtful position. 

 pictus Fabricius, Ent. Syst., iv, 391, 3 ; Syst. Antl., 176, 5 ; Macquart, 



Dipt. Exot., ii, 3^ i3, 9 (ex parte) ; Williston, these Trans., iv, 



340 (reproduction of the original). 

 Co7iops Ramondl Bigot, in Ramon de la Sagra, etc., 80H ; tab. xx, 



fig. 6 ; Williston, these Trans., iv, 340 (reproduction of the 



original). 

 flaviceps Macquart, Dipt. Exot., ii, 3, 15, 14 ; Williston, these 



Trans., iv, 341 (reproduction of the original). 

 fulvipennis Macquart, Dipt. Exot., ii, 3, 13, 10; tab. i, fig. 9; 



Williston, these Trans., iv, 341 (reproduction of the original). 



