THE CANADIAN ENTOMOLOGIST. 385 



the superior appendages not dentic- 

 ulated, apices gently decurved; 

 hamular processes directed mediad 

 and ventrad, each consisting of a stout 

 proximal and a slender distal part ; PL 

 typically represented on abdominal 



segs. 2-4 14. verticalis Hagen. 



NN. First lateral thoracic band tapering regularly dorsad, 

 its margins nearly straight; abdominal seg. 10 

 without pale spots ; superior appendages with a 

 prominent inferior basal tubercle, expanding 

 unsymmetrically from the base, the inner margin in 

 dorsal vein distinctly sinuate ; superior carina 

 moderately elevated, not denticulated, the apices 

 rounded, with a small terminal 



spine 15. ttcberculifera^ n. sp. 



GG. Hamular process separate from the hamulir fold (pi. X, fig. 4) ; 

 spine of the anterior lamina long, generally sharp-pointed, 

 projecting well below the general level of the ventral surface ; 

 a black line always present on the fronto-nasal suture. 

 Q. Lateral thoracic bands more than i mm. broad, not 

 sigmoid ; hamular processes long, slender and spine- 

 like, directed ventrad ^ and mediad; superior carina of 

 the superior appendages not denticulated, apices 

 acute (juncea group). 



R. Lateral thoracic bands straight and subequal ; 

 hamular folds fairly well developed, widely 

 separated, plainly visible in a vertical view from 



beneath 16. juncea L. 



RR. Lateral thoracic bands with the anterior margins 

 obtusangularly excavated, the first band slightly 

 bent a little above the middle ; hamular folds very 

 small, less widely separated, and almost concealed 

 in a vertical view from beneath by the overlapping 



hamular processes 17. siibarctica^ n. sp. 



QQ. Lateral thoracic bands less than i mm. broad, the first 

 one sigmoid or bent by alternate angles; hamular 

 processes broad, flat, triangular, with the inner margins 



