184 Journal New York Entomological Society. t Vo1 - xxvu. 



orange to the end of the radial cell ; sub- 

 costal vein black. Basal cell clear or nearly 

 so. Pronotum edged on hind margin and 

 at posterior angles and sometimes narrowly 

 on sides with greenish-orange. Head small 

 rather blunt in front, and proportionately 

 broader than in the next species, very 

 hairy on dorsal surface and with a con- 

 siderable amount of rather long hairs be- 

 hind the eyes ; beneath thickly clothed with 

 whitish hairs. Last ventral segment of 

 female doubly notched. Expands about 

 60 mm occidentalis Walker 



Of a slightly blueish tint, otherwise colored 

 about as in the last species, but the costal 

 margin of the fore wings to the end of 

 the radial cell often bright orange, the 

 basal cell clouded sometimes . blackened. 

 Pronotum usually plainly edged with orange 

 on sides as well as on hind margin. Head 

 not as blunt when viewed from above as 

 in occidentalis, proportionately narrower 

 and with little hair behind the eyes, also 

 less hairy beneath. Last ventral segment 

 of female not doubly notched, or second 

 notch but feebly indicated. Expands about 



60 mm bella new species 



FF. Dull bodied species or at most feebly shining, 

 with proportionately narrower wings, and 

 the hind margin of pronotum orange or 

 reddish, except in tristis where it is black. 

 Dorsum of the abdomen often with con- 

 spicuous transverse rows of short silvery 

 hairs. 



Basal cell of fore wings slightly clouded, 

 pronotum blackish mottled each side with 

 testaceous, the hind margin and sides red- 

 dish. Tergum with the posterior edges of 

 the segments reddish, the vestiture more 

 sparse than in canadensis and more in the 

 nature of hairs. Expands about 60 mm. 



rimosa (Say) 



Venation of the fore wings often thickened ; 

 basal cell clouded and blackened. Prono- 

 tum usually entirely black, except the hind 

 margin which is testaceous, sometimes 



