214 NEW YORK STATE MUSEUM 



darkened. The female has yellow antennae, the abdomen is with- 

 out spots, and the legs are of a more pronounced whitish yellow. 

 Length, 7 mm. Translation in part from 'Schiner. New Jersey. 

 (Johnson.) 



24. Chironomus albimanus Meigen 



1818 Chironomus Meigen. Syst Beschr. 1:40, 45 



1850 Chironomus Zett Dipt. Scand. 9:3551,77 



1864 Ohironomus Schiner. Fauna Austr. 2 : 604 



1877 Ohironomus V. d. Wulp. Dipt. Neerl. p.268, 38 



1804 Ohironomus annularis Meigen. Klass. 1:17, 16 



Male. Head black, proboscis, palpi and antennae^ sordidly 

 yellow, basal joint of the last black; antennal hairs brownish. 

 Dorsum of the thorax shining black, sometimes with faint indi- 

 cations of three fine cinereous lines; scutellum, metanotum, 

 pleura and pectus shining black. In immature specimens the 

 thorax is more brownish and the stripes are wider. Abdomen 

 shining black; the anterior segments fuscous; the hairs and the 

 genitalia yellowish, the claspers of the latter slender and short; 

 coxae shining brown or black; legs pale yellowish, apical one 

 half or two thirds of all the femora, the whole of the fore tibiae 

 and the extreme tips of the middle and hind ones black or deep 

 brown; each fore tarsus with its first joint whitish, the others 

 slightly infuscated; anterior legs bare; fore metatarsus 1^ times 

 as long as its tibia. Wings hyaline with a slightly smoky tinge; 

 veins including crossvein yellowish and distinct; venation as fig- 

 ured (pl.28, figs. 12, 13). ^Halteres whitish. Length 4 mm. 



Female. Like the male, but the abdomen is nearly wholly shin- 

 ing black in matured specimens and the veins of the \vings seem 

 a little darker. Length 3 mm. Ithaca, N. Y. The American 

 agree perfectly with my European specimens. 



25. Chironomus tenellus Zetterstedt 



1838 Chironomus Zett. Ins. Lappon. p.812, 15 

 1850 Chironomus Zett. Dipt. Scand. 9 : 3517, 34 



(P1.21, figs. 1 to 4) , 



Larva. The larva is pale red, 4 to 5 mini, in length. Head brown, 

 about 1.5 times as long as wide, with a few small dorsal setae. 

 Antenna (fig.4) short, about three fourths as long as the man- 

 dibles, the basal segment being three fifths of the total length. 

 The labrum (fig.l ulr.) has upon its lower surface the normal 

 three pairs of large setae and three pairs of smaller ones. The 

 epipharynx (fig.l) has the usual lateral arms (la) with the dark 

 colored extremities, the transverse comb with 5 or 6 blunt, rather 

 indistinct teeth, and the stout curved pectinate hairs. The man- 

 dible (fig.l md) is stout, with blackened teeth, a longitudinal 



