166 ENTOMOLOGICAL SOCIETY 



The following paper by Mr. Coquillett was read by title : 



NEW NORTH AMERICAN DIPTERA. 

 By D. W. COQUILLETT. 



At various times in the past few years, in the course of identi 

 fying specimens of Diptera for various correspondents, the writer 

 has given manuscript names to new species, at the request of the 

 senders, and as several of these names have since appeared in print, 

 while others are shortly to be published, it is desirable to have 

 these species characterized so as to give the names a standing. 

 Accordingly the descriptions are appended herewith, together 

 with those of several other species which are as yet apparently 

 undescribed : 



Family CHIRONOMID^. 



Ceratopogon medius, n. sp. 



Near varicolor, but differs in the coloring of the legs, the presence of 

 black bristles on the hind tibiae, etc. Black, the face, mouth parts, joints 

 two to seven of the antennae, the halteres, abdomen, tarsi except the nar 

 row apices of the joints, a ring before apex of each front femur and both 

 ends of the front and middle tibiae except their extreme apices, yellow. 

 Eyes narrowly separated on the front. Thorax bluish gray pruinose. 

 Front femora slightly thickened, each bearing four black spines on the 

 under side, other femora without spines, first tarsal joint nearly twice as 

 long as the second, the fourth joint dilated, bilobed at the apex, less than 

 one-half as long as the fifth, the latter without spines on the under side, 

 the two claws of each tarsus subequal in size. Wings bare, whitish hya 

 line, third vein separated from the first, not connected bv a cross-vein, 

 reaching three-fourths length of wing, apex of first vein a short distance 

 before middle of the third, fourth vein forks almost opposite the small 

 cross-vein. Length 2 mm. 



Riverton, New Jersey. A female specimen collected on July 

 7 by Mr. C. W. Johnson. 



Type. No. 7942, U. S. National Museum. 



Family CULICIDyE. 



Tseniorhynchus nigricans, n. sp. 



Near perturbans^ but smaller and darker, the first joint of the hind tarsi 

 devoid of a median light colored band, etc. Deep black, a median band 

 on the proboscis and the halteres yellow. Scales of palpi black, those at 

 the apex white, appressed scales of occiput yellow, the upright ones brown. 

 Mesonotum nearly covered with golden yellow scales, those of the abdo 

 men black and with a lateral patch of whitish ones in the front angles of 



