386 THE CA.NADIAN ENTOMOLOGIST. 



closely approximate, the apices directed cephalad ; 



superior carina of the superior appendages more or less 



denticulated {caerulea group). 



S. Spine of the anterior lamina distinctly longer than 

 the hamular processes, slender, curved ventrad, 

 sharp pointed ; distance from hind margin of 

 occiput to frontal vesicle 2.5 mm.; MD small, 



triangular, yellowish , 18. sitcheiisis Hagen. 



SS. Spine of the anterior lamina not longer than the 

 hamular processes, rather stout, straight, bluntly- 

 pointed ; distance from hind margin of occiput to 

 frontal vesicle less than 2 mm.j MD large, sub- 

 quadrate, more or less 

 bluish 19. septe7itrionalis Hagen. 



2. Females. 

 A. Abdominal segment i with a distinct ventral spinulose tubercle. 



B. A black line on the fronto-nasal suture ; length of abdomen 



(excl. appendages) 36-38 mm i. calif ornica Calvert. 



BB. No black line on the fronto-nasal suture ; length of abdomen 

 more than 40 mm. 

 C. Abdomen about four times as long as the thorax (excl. 

 prothorax) ; ventral tubercle on seg. i but little elevated ; 

 appendages 7 mm. long, lateral thoracic bands widening 

 above ; Ag arising opposite or distal to the last cubito- 

 anal cross-vein before the subtriangle ; outer side of anal 

 loop of hind wing about as long as inner side of 



triangle 2. miitata Hagen. 



 CC. Abdomen less than four times as long as the thorax ; a 

 prominent ventral tubercle on seg. i ; appendages 5-6 

 mm. long, lateral thoracic bands subequal ; A2 arising 

 proximal to the last cubito-anal cross-vein before the sub- 

 triangle ; outer side of anal loop of hind wing longer than 



inner side of triangle 3. multicolor Hagen. 



AA. Abdominal segment i without a ventral spinulose tubercle. 



D. Basal plate of ovipositor not bilobed, posterior margin straight 

 or slightly convex ; PL generally connected with PD on 

 abdominal segs. 2-4 (often separate in Ae. wnbrosa)^ usually 

 smaller than the latter. 



