MAY FLIES AND MIDGES OF NEW YORK 



235 



54. Chironomus willistoni nom. nov. 



1896 Chironomus sp. Will. Trans. Ent Soc. Lond. p.275, 6 



Male. Light yellow, the antennae brownish, and, rarely, the 

 posterior part of the abdomen also brownish. Extreme tip of the 

 four posterior tibiae black; front metatarsi about one fourth 

 longer than their tibiae. Wings hyaline; anal angle only feebly 

 indicated. Length 2 to 2.5 mm. Williston, loc. cit. St Vincent 

 Island, West Indies. 



55. Chironomus anonymus Williston 

 1896 Chironomus Will. Trans. Ent. Soc. Lond. p.274, 2 



The larvae are described by Dr H. G. Dyar (1902). They are 

 bright red in color, and possess the four ventral blood gills of 

 tlie eighth segment. The mouth parts are not described. The 

 pupa is of the usual type. Both larvae and pupae were found in 

 a rain-water barrel at Bellport, N. Y. 



Imago, male. Head red, or reddish yellow, the front more yel- 

 low. Antennae brown, first joint red; pluraosity at the tip black- 

 ish. Mesonotum light brownish red; two stripes and the humeri 

 yellow; scutellum liglit yellow. Pleura light brownish or reddish 

 yellow. Metanotum brown. Abdomen blackish, the first segment 

 and the distal part of the next frv^^o or three segments yellow or 

 yellowish. Legs yellow; the immediate tip of the tibiae and the 

 tip of all the tarsal joints dark brown ; proximal end of the front 

 tibiae also brown; front tibiae about one half the length of their 

 met.atarsi, and not longer than the second joint. Wings nearly 

 hyaline. Length 4 to 5 mm. Williston, loc. cit. St Vincent 

 Island, West Indies. 



A male specimen from Illinois differs from a St Vincent co-type 

 specimen in being paler, in having the thoracic stripes, pleura, 

 metanotum and sternum pale reddish yellow or buff colored, the 

 remaining parts greenish yellow, the abdomen as described, the 

 paler parts with a greenish tinge. 



56. Chironomus innocuus Williston 

 1806 Chironomus Will. Trans. Ent. Soc. Lond. p.274, 5 



Male. Head and basal joints of the antennae light yellowish ; 

 T)alpi brown; antennae brown. Thorax light yellow; mesonotum 

 with a brown stripe in the middle in front, and, on either side, an 

 oval brown spot, the three separated, and the middle stripe 

 bisected by a slender yellow line. Scutellum light yellow. Meta- 

 notum brown; halteres brown. Abdomen black, with black hair; 



