290 NEW YORK STATE MUSEUM 



.tudinal groove; scutelluni sordidly yellow or brownish. Abdomen 

 subsliining, fuscous, the sides and venter a little paler, the last 

 two or three segments and sometimes the lateral margins of some 

 of the others black; posterior margins of all the segments slightly 

 paler than the rest of the surface. Genitalia brownish, conspicu- 

 ous, with four pairs of appendages, the outer pair elongate (pl.33, 

 fig.5). All hairs reddish brown. Coxae dark, legs pale brown, 

 extreme tips of middle and hind tibiae black, fore tarsi moderatel}^ 

 hairy, middle and hind legs Avitli long but delicate pale brown 

 hairs. Fore metatarsus over 0.4 longer than its tibia. Wings 

 hyaline, costal margin very slightly yellowish, anterior veins pale 

 yellowish, hairs dusky (pi. 30, fig. 17). Hal teres pale. 



Female. Like the male but shorter ; antennae yellow ; wings 

 more densely hairy, and wider in proportion to its length. Length 

 of male 4 mm., of female 2.5 mm. Ithaca N. Y. 



6. Tanytarsus sp. 



Pupa. Respiratory tubes are very delicate and transparent, 

 each apparently consists of about six long slender filaments re- 

 sembling those of a Simulium pupa, but they appear to be jointed. 

 The dorsal markings of each abdominal segment consist of an an- 

 terior and posterior transverse band of moderately coarse, short 

 spines, a central area of very minute spines, arranged as shown 

 on pl.22^ fig.l3. The lateral fins of the eighth segment terminate 

 in a spiny spur as shown on pi. 22, fig.17. The caudal fringe is as 

 usual. 



Imago, male. Head yellowish, including proboscis, palpi, and 

 antennae, the basal joint of the last brown. Thorax reddish 

 brown; the narrow space between the three Avide brown dorsal 

 stripes and the scutellum yellowish. Abdomen pale brown, venter 

 more yellowish excepting toward the extremity. Incisures but 

 little if any paler, genitalia and the abdominal hairs pale. Legs, 

 including the apical half of the coxae, whitish, the tip of each 

 middle and hind tibia with a minute black circular comb, one 

 tooth of which is prolonged into a spur. Fore metatarsus about 

 one third longer than its tibia. Wings hyaline, with a slight milky 

 tinge, hairs pale, veins colorless. Halteres pale. Length 3.5 to 

 4.5 mm. 



Female. Like the male but abdomen more brownish. Saranac 

 Inn N. Y. 



7. Tanytarsus junci Meigen 



1818 Chironomus Meigen. Syst. Beschr. 1 : 50, 68 



1874 Tanytarsus V. d. Wulp. Tijd. v. Ent. 17 : 134 



1877 Tanytarsus V. d. Wulp. Dipt. Neerl. p.287, 9 



1898 Chironomus Lundb. Vidensk, MeddeJ. p.283, 69 



