ADAMS : DIPTEROLOGICAL CONTRIBUTIONS. 39 



33. Posterior tibiaj wholly yellow. . ohscuricornis Loew. 



Posterior tibii« brownish annulate sahlbergii Loew. 



34. Abdomen largely yellow quinquepunctata Loew. 



Abdomen largely black 35 



35. Second and third veins curved forward recurva, n. ep. 



Second and third veins straight 36 



36. The yellow of abdomen confined to bases of segments ingrata Will. 



The yellow of abdomen confined to apices and lateral margins of segments, 37 



37. Third antennal joint wholly black halteralts, n. sp. 



Third antennal joint not wholly black varieeps Loew. 



38. Third antennal joint wholly black 39 



Third antennal joint not wholly black 41 



39. Terminal portion of the arista white 40 



Terminal portion of arista not white sulphurea Loew. 



40. Abdomen largely black graminea Coq. 



Abdomen largely yellow albifascies, n. sp. 



41. Pleurifi spotted rubida Coq. 



Pleuraj immaculate einerapemiis, n. sp. 



In the above table no attempt has been made towards a sub- 

 division of the genus, it being intended merely for an easy-dis- 

 position of the known species of Clilorops in its widest sense. 



Chlorops appropinqua, n. sp. 



Head yellow, occiput on upper half, frontal triangle, anten- 

 nae, except arista, which is brownish, clypeus wholly, and paljDi, 

 black, third antennal joint rounded, cheeks at least as wide as 

 one-half the eye height, the frontal triangle smooth, except on 

 the sides, and reaches the anterior edge of the front ; thorax 

 yellow, mesonotum with three broad black stripes reaching its 

 entire length, pleura^ with three black spots, scutellum yellow, 

 blackish on sides at base, halteres yellow ; abdomen black, nar- 

 row lateral margins, apex and venter yellow ; legs black, the 

 knees, middle and hind coxse, middle tibiae almost wholly, pos- 

 terior tibiae at extreme tip, and base of middle and hind tarsi 

 yellow ; wings hyaline, second and third veins almost straight, 

 hind cross-vein slightly more than its length from the small. 

 Length, 3.5 mm. 



Eleven specimens from Hamilton and Morton counties, Kan- 

 sas, collected by Dr. F. H. Snow ; two from Garden City, Kan,, 

 collected by H. W. Menke ; two from Lusk, Wyo., collected by 

 Messrs. W. A. Snow and Hugo Kahl, and two from Colorado. 



At first I took this to be that form of Chlorops pullipes Coq., 



