MAY PLIES AND MIDGES OF NEW YORK 267 



gg Fore metatarsus 0.0 as long as its tibia; female with a 



peculiar egg guide, pl.33, fig.T 12. a b s u r d u s n. sp. 



ff Fork of cubitus distad of crossveiu 



g Ri^f, enters the wing margin far proximad of tip of Cui ; 



length 1.25 to 2 mm. (Greenland) 13. c 1 a r i p e n n.i s 



gg R^-h enters wing margin distad of CUi 



h Small blackish species 1 to 1.5mm. long; fore metatar-. 



sus a little shorter than its tibia 14. m i n u t u s 



lih Species 2 to 2.5 mm. long ; greenish black ; fore metatar- 

 sus a little over one half as long as its tibia 



15. f u g a X n. sp. 

 cc Legs fuscous or black; thorax of male usually not striped; 

 antennae black 

 (I Small black species 1 to 1.5 mm. in length ; fore metatarsus a 



little shorter than its tibia 14. m i n u t u s 



dd Larger species 2.5 to 3 mm. in length 



e Fourth tarsal joint obcordate, shorter than the fifth. (For 



description see genus T h a 1 a s s o m y i a ) platypus 



ee Fourth tarsal joint linear 



f Fore metatarsus at least three fourths as long as its tibia 

 g Anterior tarsi of the male densely hairy; wings white; 

 veins fuscous at base; abdomen subshining black ; length 



3 mm 16. p u b i t a r s i s 



gg Fore tarsi of the male nearly bare ; last three abdominal 

 segments with pale margins ; thorax of the female 

 striped. (Compare also sordidellus) 



3. f r i g i d u s 

 ff Fore metatarsus not more than two thirds as long as its tibia 

 g Wings whitish hyaline, a little darker in the female ; abdo- 

 men fuscous, with fuscous hairs 



17. o b u m b r a t u s n. sp. 



gg Wings cinereous ; abdomen velvet black with the margins of 



the segments shining black ; fork of the cubitus under or 



but very slightly beyond the crossveiu IS. b a s a 1 i s 



Note — Consult' also the auxiliary key of Walker's species on p. 198 



1. Orthocladius par Coquillett 

 1901 Orthocladius Coq. Froc. U. S. Nat. Mus. 23 :G08 



Male. Yellow, the aDteunae except the basal joint, apices of 

 front femora, of their tibiae and of their first two tarsal joints, 

 tlie whole of the remainini!: joints, also the last two on the other 

 tarsi, broAvn; a pair of rather large black spots on abdominal seg- 

 ments two to eleven (sic.) ; mesonotum marked with three darker 

 yellow vittae, hairs of antennae bright yellow, becoming brownish 

 at their apices; front tarsi destitnte of long hairs, the fonrth joint 

 more than one third as long as the fii'st; wings bare, whitish hya- 

 line, the portion in front of K^ and K^-j.-, dark gray, the veins 

 brownish ; length 6 mm. Riverton, N. J. Coquillett, loc. cit. 



