MAY FLIES AND MIDGES OF NEW YORK 233 



51. Chironomus longimanus Williston 



(P1.29, fig.lO) 

 1896 Chironomus Will. Trans. Ent. Soc. Lend. " p.274, 3 



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

 deep brown, the phimosity 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 vellow ; the metanotum and a spot below the halteres 

 blackisii. xVbdomen yellow; a black band on the posterior margin 

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

 tcn-ior, or greater part of the fifth segment, and the hypopygium, 

 black or dark brown. I^gs yellow ; the base and tip of the four 

 ])osterior 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. I^gs, 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'l. 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 l)asal joint about five ninths of the w^hole length, the 

 remaining joints slender fpl.23, flg.2). The mandibles, labrum, 

 and epipharynx resembling those of C. d e c o r u s . The setae 

 of the epipharynx pectinate. The teeth of the transverse comb 

 as large as in b. d e c o r u s 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 ])ale 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 



