268 Maine: agricui.turaIv experimicnt station. 1911. 



dd. Fork of the cubitus opposite or distad of proximal end of 

 crossvein. 

 e. Thorax partly yellow, usually with black thoracic stripes ; 

 spurs brown ; fore tarsi nearly or quite twice, fore 

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

 yellow, 

 f. Costa but slightly produced beyond Rs ; Scs near middle 

 of Sci. 

 g. Cubitus forks proximad of the distal end 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 fascise. 



9. notescens n. sp. 

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

 female uniformly fuscous. 



pa. notescens, 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 coxEe dark ; abdomen of 



female fasciate; 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; Sc2 before 

 the middle of Sci ; abdominal sclerites margined 

 with yellow (female); coxae yellow; Alaska. 



II. heringensis. 

 gg. With other combination of characters. 



h. Costa produced at least 1-5 of distance from Rs 

 to Ml. 

 i. Sci ends in C distad of the base of Rs. 

 j. Coxae black. 12. Hopkinsii. 



jj. Coxae yellow; Sc2 distad of middle of Sci. 



13. sobria n. sp. 

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

 Rs ; Sc2 distad of middle of Sci. 

 j. Coxae wholly grayish; claws in both sexes 

 with basal tooth. Cjreenland. 



14. arctica. 



