S. W. Willistou.— North Amerimu Conops. 327 



Schiiier li:i8 dividc^l the genus t'onoj^s, upon what nppears to me 

 insufficient grounds.* I have retained all our American species 

 under the genus in its wider sense. 



In the following table I have not attempted to include the species 

 of Macquart, nor his identifications. I have added the original 

 descriptions at the close of the article, although there is very little 

 possibility of their ever being recognized. C. pictus F. is also not 

 included in the table, but its description is given : 



A. — Small cross-vein nearly opposite or before the tip of the cos- 

 tal vein and near the middle of the discal cell. a. 



B. — Small cross-vein beyond the tip of costal vein and near the 

 outer third of discal cell ; third joint of antennae much shorter than 

 the second. e. 



a. — Third joint of antennae much shorter than the second. Face 

 and cheeks yellow ; facial grooves not darkened ; front wholly black; 

 wings brownish before, snbhyaline behind, picture indistinct** 



ohscurlpennis, n. sp 



— Third joint of antenna3 nearly or quite as long as second, brown 

 of anterior portion of wings with distinct outlines. b. 



b. — Attenuated portion of antennal style very short, head compar- 

 atively narrow, proboscis very short, a hyaline crossbaud before the 

 tip of the wing. Shining black, dust grayish, front blackish or black. 



sylvosus, n. sp. 



— Attenuated portion of style quite long ; proboscis considerably 

 longer than the head ; the brown reaches the whole length of the 

 wing. ^ ... C. 



C. — Stripe of dust on upper half of pleura indistinct or without dis- 

 tinct borders. Front black, cheeks brown behind; proboscis about 

 once and a half the length of head. (Dark colored species.) 



bulbirostrls Lw. 



— Stripe of dust on upper half of pleura as shai"ply defined as on the 

 under half d. 



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

 pleura narrow. Dust on the sides of mentanotum much narrowed 

 toward the disk; front mostly red, darkest above base of antenna?. 

 (Reddish species.) excisus Wied. 



— Proboscis scarcely once and a half the length of head, much 

 swollen at the base ; pleural stripe broad above. Dust broadly 



* Schiaer's characters are as follows : 



Scheukel riicht verdickt, wenn sie aber verdickt sind, danu ist die Yerdickeruug an 

 der Basis uicht auff'allend, snndam voo da bis zur Spitze eia regelmassige ; zweiter 

 Hinterleibsriiig nicht auffallend schmaler iind langer als die iibrigen Rings. — Conops 

 Lin. 



Schenkel an der basis plotzlich und in auffallender Weise verdickt, so dass die Ver- 

 dickerung immer unregelmassig erscheint ; zweiter Hinterleibsring auflallend schmaler 

 und langer als die iibrigen Ringe. Physocephala Sch. 



