MAY FLIES AND MIDGES OF NEW YORK ^- ' 



This pale green siiecies i-esemblcs (^ v i r i d i s, l)iit is smaller; 

 the thoracic stripes, the steniiiin aud the inetanotuni i)ale ferru- 

 ginous, sometimes subobsolete; the claspers of the male quite 

 long and slender; the legs pale yellow or white; the femora some- 

 times slightly greenish ; the extreme tip of the tibiae and of the 

 metatai'si and the whole of the last tarsal joints brownish. Well- 

 colored specimens, with distinct ferruginous thoracic stripes, have 

 the legs more greenish, and the fore legs brownish. The fore tibia 

 is one third shorter than the femur and the fore metatarsus nearly 

 twice as long as its tibia; the remaining tarsal joints are much 

 sliorter; fore tarsi are bare; the hind legs are hairy. Halteres 

 and wings white. Length 3.5 to 4.5 mm. Translation from V. d. 

 Wulp. Greenland (Lundbeck) ; Washington vState; Long Island, 

 N. Y. 



43. Chironomus modestus Say 



1823 Chironomus Say. Journ. Acad. Nat. Sc. Phil. 3 : 13, 3 



1828 Cliironomns Wied. Aussereurop. zweifl. 1:18, 8 



1859 Chironomus Say. Oompl. Wr. 2 : 41, 3 



1878 Cbironomus Ost. Sack. Oat'l. Dipt. N. A. p.21 



Larva. (P1.22, flgs.8 to 12) . The larva is buff -colored or yellow, 

 with a slight reddish tinge ; length 6 to 7 mm. The head is brown 

 Avith a few dorsal setae; antennae (fig.9) slender, as long as the 

 mandibles, basal joint three fifths of the whole length. The 

 hibrum (fig. 10 ulr) with a few prominent pale setae, several hairs 

 of which are pectinate. The epipharynx with the usual pectinate 

 setae, lateral arms and transverse comib, the last with but five 

 blunt rounded teeth. Mandibles (flg.ll) with blackened teeth. 

 Maxillae (fig.llmx) with sliort j)aliins. several setae aud a small 

 group of mesad projecting slender lobes. Labium (fig.ll 1) Avith 

 rounded margin, the teeth with rounded outline, and a ])air of 

 ventral setae. Posterior prologs with bilobed claws, anal blood 

 gills distinct; the jiosterior dorsal tufts of setae are each placed 

 uipon a papilla which is about as broad as long, and which has a 

 very delicate seta on its side. 



Pupa. Pale green, length 5 to 5.5 mm. Respiratory organs 

 consist of a pair of tufts of white filaments. Dorsal surface of 

 the fourth abdominal segment (fig.l2) marked with two trans- 

 \ersely oval patches of microscopic setae near the anterior mar- 

 gin and a. large patch with few clear sjtaces covering the gi'eater 

 portion of the dorsum; this ])atch is widest at the ])osterior mar- 

 gin. The third, fifth and sixth segments are similarly marked, 

 but the patches are smaller on the fifth and sixth, and larger on 

 the third; the seventh and eighth are usually bare; the second 

 has the usual transverse row of longitudinal ridges on its poste- 

 rior margin, and the dorsal surface is marked like that of the 



