MAY FLIES AND MIDGES OF NEW YORK 233 



51. Chironomus longimanus Williston 



(P1.29, fig.10) 

 1896 Chironomus Will. Trans. Ent. Soc. Lond. p.274, 3 



Male. Head yellow. Antennae, save the basal joint, black or 

 deep brown, the plumosity grayish black. Thorax light yellow ; a 

 blackish brown stripe, running from in front of the root of each 

 wing, and joining in the middle in front, forming a V-shaped 

 figure; below these stripes the sides of the mesonotum are of a 

 purer yellow; the metanotum and a spot below the halteres 

 blackish. Abdomen yellow ; a black band on the posterior margin 

 of the first and second segments; the fourth segment, the pos- 

 terior, or greater part of the fifth segment, and the hypopygium, 

 black or dark brown. Legs yellow; the base and tip of the four 

 posterior femora, and the proximal end of their tibiae brown; 

 front legs much elongate, the metatarsi about one fourth longer 

 than their tibiae. Wings nearly hyaline. Igs, 3 to 4 mm. 

 Williston, loc. cit. St. Vincent Island, West Indies. 



52. Chironomus lobiferus Say 



1823 Chironomus Say. Journ. Acad. Nat. Sc. Phil. 3 : 12, 1 



1859 Chironomus Say. Compl. Wr. 2:41, 1 



1828 Chironomus lobifer Wied. Aussereurop. zweifl. 1:16, 4 



1878 Chironomus Ost Sacken. Oat' 1. Dipt. N. A. p.21 



Larva. Blood red; length 14 to 15 mm. Head dark brown, 

 each eye consists of two distinctly separated spots; the antennae 

 are about three fifths as long as the mandibles, brownish in 

 color, the basal joint about five ninths of the whole length, the 

 remaining joints slender (pl.23, fig.2). The mandibles, labrum, 

 and epipharynx resembling those ofC. decorus. The setae 

 of the epipharynx pectinate. The teeth of the transverse comb 

 as large as in C. decorus but not all are of the same length. 

 The maxilla and the labium are as shown on pl.23, fig.3; the 

 toothed margin of the latter being deep black. The setae of the 

 anterior pair of legs are curved and hair-like. The anal prolegs 

 have the usual bilobed claws; the four anal blood gills are short, 

 about three times as long as wide; the caudal setae are as usual. 



Pupa. The pupa has plumose respiratory filaments; the mark- 

 ings of the dorsum of the abdominal segments consists of a uni- 

 formly distributed area of miscroscopic spines. The lateral fins 

 of the eighth segment (pl.23, fig.5) has the usual lateral filaments, 

 and each terminates in a very small comb of about seven teeth. 

 The caudal fin bears the usual fringe of matted filaments. 



Imago. Antennae yellowish brown; thorax pale cinereous, the 

 three lines testaceous: scutel and metathorax testaceous; wings 

 white, with a brownish obsolete point near the middle; pectus 

 testaceous; feet pale yellowish, tergum somewhat glaucous, the 



