268 MAINE AGRICULTURAL EXPERIMENT STATION. I9II. 



dd. Fork of tlie culjitr.s opposite or distad of proximal end of 

 crossvein. 

 e. Thorax partly yellow, r.sr.ally with black thoracic stripes; 

 spurs brown : fore tarsi nearly or quite twice, fore 

 metatarsus over .8 as long as the libia ; palpi usually 

 yellow, 

 f. Costa but slightly produced beyond Rs ; Sc:; near middle 

 of Sc. 

 g. Cubitus forks proximad of the distal cud of the 

 crossvein ; petiole of media less than 4 times as 

 long as basal section of Rs. 6 imitator n. sp. 



gg. Cubitus forks nearly under the fork of the media: 

 petiole of the media over 6 times as long as basal 

 section of Rs. 7. gracilis n. sp. 



ff. Costa produced at least 1-4 distance from Rs to M. 



g. Sc2 near middle of Sci ; antennae nearly as long as 

 the body in the male. 8. longicornis n. sp. 



gg. Sc2 distad of the middle of Sci. 



h. Subcosta ends in the costa opposite base of Rs ; 



abdomen of female with yellow fasciae. / 



0- notcsccns n. sp. jf 

 hh. Subcosta ends distad of base of Rs ; abdomen of 

 female uniformly fuscous. 



9a. notcsccns. varieties. 

 ee. Thorax black; and usually with yellow tibial spurs, 

 shorter tarsi and dusky palpi, 

 f. Subcosta ends over the base of Rs; petiole of M is 

 shorter than the crossvein; part of third joint of 

 antenna yellow ; posterior coxae dark : abdomen of 

 female f asciate ; Arctic species. 10. grocnlandica. ^ 



ff. With other combination of characters. 



g. Sci ends in C slightly proximad of the base of Rs ; 

 petiole of M shorter than the crossvein; Sco before 

 the middle of Sci ; alidominal sclerites margined 

 wiih yellow (female): coxae yellow; .\laska. 



II. bcringcnsis. 

 gg. Vv'ith other combination of characters. 



h. Costa p'-'oduced at least 1-5 of distance from Rs 

 to Mi. 

 i. So. ends in C distad of the liase of Rs. 

 i. Coxae black. 12. Hofkinsii. ^ 



ji. Coxae yellow: Sc- distad of middle of Sci. 



I ^. sohria n. sp. 

 ii. Sci ends in C opposite or proximad of base of 

 Rs : Sci distad of middle t)f Sc. 

 j. Coxae wholly grayish ; claws in both sexes 

 with basal tooth. Creenland. 



14. arctica. 



