MAY FLIES AND MIDGES OF NEW YORK 301 



dd Larger species ; if 2 to 2.5 inm., then velvet black, and otherwise 



not as above 



e Legs long and densely haired; fore metatarsus two thirds as 

 long as its tibia ; length 3 to 4 nun. (Greenland) 



9. ursinus 



ee Legs sparsely haired ; male velvet black, female dull ; fore meta- 

 tarsus but little over half as long as its tibia 



. 10. f u s c i p e s 



NOTE. Consult also auxiliary key containing Walker's species, p.198. 



1. Metriocnemus nanus Meigen 



1818 Chironomus Meigen. Syst Beschr. 1 : 50, 69 

 1874 Metriocnemus V. d. Wulp. Tijd. v. Ent 17 :136 

 1877 Metriocnemus V. d. Wulp. Dipt. Neerl. p.292, 4 



Antennae and palpi dark brown; head and thorax yellowish 

 green, the stripes grayish black, the sternum black. Abdomen 

 brown above with pale incisures, the venter pale yellow. Legs 

 brown. Wings hyaline, the veins somewhat brown. Halteres 

 white. Length, male, 1.33 mm.; female, 1 mm. Meigen, loc. cit. 



This species is said to occur in Greenland (Lundbeck) . The iden- 

 tification being doubtful, Lundbeck redescribed the Greenland 

 specimens. For these I propose the name lundbeckii (see 

 no. 5.) 



2. Metriocnemus flavifrons n. sp. 



(Pl.31, fig.l) 



Male. Head yellow, proboscis and palpi fuscous, the first joint 

 of the antenna shining brown, the second yellow, the remaining 

 joints and the hairs fuscous. Eyes black. Dorsum of the thorax 

 yellow with three dull, dark brown stripes, sparsely covered with 

 pale hairs. Pleura yellow, scutellum, metanotum, and sternum 

 dark brown. Abdomen dark brown with the posterior one third 

 of each segment yelloAv; hairs and the genitalia pale brown. 

 Coxae brown, legs yellowish, the tarsi slightly infuscated, legs 

 very sparsely haired, anterior metatarsus about four fifths as 

 long as its tibia. Wings hyaline, hairy, E 4+5 straight and ends 

 close to the tip of the wing; halteres pale. Length 3 mm. 



Female. Like the male, but has wider wings; venation as 

 figured. Ithaca N. Y., July. 



3. Metriocnemus par n. sp. 



(Pl.31, fig.2; pl.33, flg.6) 



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

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

 the whole of the remaining joints, also the last two on the other 



