200 NEW YORK STATE MUSEUM 



1. Chironomus brachialis Coquillett. 



1901 Chironomus Coquillett Proc. U. S. Nat. Museum. 23:607 



1902 Chironomus ?atrimanus Coq. Proc. Nat. Mus. 25 : 94 



Male. Head black, the face brownish yellow, mouth parts 

 brown, first joint of antennae black, the others yellow, hairs of 

 antennae pale yellow, changing into white at their apices ; thorax 

 and scutellum black, polished ; abdomen yellow, middle of dorsum 

 of second segment prolonged to the lateral margin at the hind 

 end, on the front end extending entirely around the segment, 

 narrow bases of the three succeeding segments and whole of the 

 following ones, including the genitalia, brown ; legs yellow, apex 

 of front femora, front tibiae and their tarsi except the basal two 

 thirds of first joint, knees of other legs, apices of their tibiae, 

 sutures of first three tarsal joints and whole of the two following 

 brown, front tarsi fringed with rather long hairs on outer side of 

 second and third joints; wings bare, basal portion hyaline and 

 with yellow veins, the remainder grayish hyaline and with brown- 

 ish veins, an indistinct darker brown spot on the small crossvein ; 

 halteres yellow. Length 5 mm. 



Female. As in the male except that the first antennal joint is 

 yellow, broad humeral region tinged with yellow, second and three 

 following abdominal segments largely brownish (front tarsi want- 

 ing), wings with a broad brown cross band which in its outer 

 portion includes the small crossvein. Habitat Westville, N. J. 



A male specimen from Ithaca, N. Y., agrees with the above 

 description excepting that the antennal hairs are wholly yellow. 

 In this specimen the thorax when viewed obliquely is faintly pol- 

 11 nose; the last three albdominal segments are flattened; the geni- 

 talia rather short ; the fore metatarsus is about one fourth longer 

 than its tibia ; and the venation as shown on pi. 28, fig.l. 



2. Chironomus atrimanus Coquillett 



1902 Chironomus Coquillett. Proc. U. S. Nat Mus. 25:94 

 This may possibly be identical with the preceding. 

 Female. Head yellowish brown, antennae yellow, the last joint 

 and the mouth parts brown ; thorax and scutellum black, highly 

 polished; abdomen somewhat polished, black, the first segment 

 yellow, hind margins of three to six yellowish ; legs yellow, front 

 tibiae and their tarsi black, apices of femora, both ends of middle 

 and hind tibiae, apices of joints of their tarsi and whole of the last 

 two joints blackish, front tibiae four fifths as long as the first 

 joint of their tarsi ; wings strongly tinged with yellow on the basal 

 third, followed by a wide brown band extending from costa to fifth 



