THE CANADIAN ENTOMOLOGIST. 417 



and wholly glabrous frontal surface. The eyes are notably larger and the 

 front narrower in the male than in the female. 



H. coloradana, n. sp. — Form moderately elongate, oblong-suboval, 

 not very convex, polished, strongly, not densely ' punctate, black ; head, 

 except at each side of the basal margin, and sides of the pronotum 

 abruptly and narrowly but not extending to the base, though finely 

 throughout the apical margin, yellow ( (^ ) ; elytra with a moderately 

 narrow, abrupt, subparallel yellow side margin from base to apical third, 

 and a rather small, widely detached subapical spot ; under surface black, 

 the anterior legs pale ; mes-episterna pale in external half. Length, 2. 2 

 mm.; width, 1.6 mm. Colorado (Boulder Co). 



Resembles the Californian dissoluta, Cr., very greatly, but has the 

 yellow side margin of the elytra much less sinuated internally and shorter, 

 the apical spot smaller and rather nearer the suture and the outer half of 

 the mes-episterna pale, but, more especially, in the much less convex, more 

 oblong and less oval form of the body. 



H. serefia, n. sp. — Coloration, lustre and punctuation throughout 

 nearly as in inflexa, but with the expanded apex of the marginal reddish 

 vitta less anteriorly extended ; form of the body more narrowly oblong 

 and parallel, not regularly oval as in inflexa ; abdominal plate more 

 broadly rounded and not quite attaining the first suture. Length 2.5 mm.; 

 width, 1.7 mm. Pennsylvania, Warren Knaus. 



Differs from inflexa in the form of the body and other characters. 



H. N'une/unackeri, n. sp. — Rather broadiy oval and convex, nearly as 

 m post tea, h\2ick, j)olished, sparsely but niore distinctly punctate; head 

 and pronotum (9) black, the latter without trace of pale side margin;, 

 elytra each with a parallelogramic marginal yellow spot at base, twice as 

 Jong as wide, ending abruptly behind and truncate, and also a transversely 

 but broadly oval subapical spot, twice as far from the suture as the apical 

 margin ; beneath black throughout, the tibise somewhat, and the tarsi 

 decidedly, pale. Length, 2.75 mm.; width, 2.05 mm. California (River- 

 side), Nunenmacher. 



Allied \.o posiica, Lee, but differs in the absence of the pale sides of 

 the pronotum and in the presence of a short, broad, parallel humeral spot 

 on the elytra. 



H. protensa^ n. sp. — Rather more elongate, narrow and parallel than 

 any other species, shining, deep black above and beneath, the head and 

 pronotum wholly black ( 9 ), the elytra with a narrow even and feebly 



