NORTH AMERICAN COLEOPTERA. 13 



southern California (Xantus). The specimens from the southwestern 

 regions are generally larger. 



H. fristis Mann.— Oblong, snbdepressed, piceous, rather sparsely clothed 

 with the usual short brownish pubescence, longer on the head and thorax, sides 

 of thorax indistinctly paler, more broadly in front, lateral margin entirely but 

 narrowly pale, the usual sinuous bands much broken into short longitudinal 

 lines, the juxta-scutellar spot forming a rather long stripe, on each side of this 

 one third from base a short stripe, more posteriorly a pair of lines the inner ob- 

 lique, the outer longitudinal, behind these two more, both slightly oblique, 

 sometimes united. Antennse piceous. Head piceous, densely punctulate. Thorax 

 rather more than twice as wide as long, sides arcuate, base arcuate, slightly ob- 

 lique each side, marginal line distinct, color piceous, with an indistinct yellow 

 border, wider in front. Elytra parallel, vaguely substriate, punctuation close, 

 variable in coarseness ; epipleura pale. Body beneath piceous, sides of prothorax 

 and abdomen narrowly, yellow. Metasternum with distinct mesocoxal line. 

 Abdomen closely punctulate. Femora and tarsi pale, tibiaj piceous. Length 

 .12— .18 inch. ; 3—4.5 mm. PI. 1, fig. 9. 



l/a?e.— Labrum broader than long, arcuately narrowed to the tip, apex emar- 

 giuate at middle. Mandibles scarcely prominent, with scarcely evident basal 

 lobe on outer side. Front slightly retuse. Thorax as wide as the elytra, arcu- 

 ately narrowed to the front. 



Female.— 'La.hrnm shorter and more obtuse in front than in male; mandibles 

 stouter. Front not retuse. Thorax a little narrower than the elytra and more 

 narrowed in front. 



Variatiom.— For a species in which the bands are so much broken 

 as to lose almost all trace of their sinuous relationship, the markings 

 are remarkably perminent, becoming merely a little broader and 

 occasionally slightly confluent. 



In the remarks on the differential characters of the preceding 

 species, those with which this might be confounded have been referred 

 to and need not be repeated here. 



In distribution this species seems essentially northern. Massachu- 

 setts (Blanchard), New York, Philadelphia (Liebeck), Canada, 

 Wisconsin, Dacota, Nevada and Sitkha (Motschulsky). 



H. pusillus Say.— Oblong, moderately convex, yellowish testaceous to 

 pale fuscous, either entirely uniform in color, or with a broad darker band 

 through the centre of the upperside, surface with short yellowish pubescence, 

 the margin slightly fimbriate. Antennae testaceous. Head fuscous, densely 

 punctulate. Thorax twice as wide as long, sides arcuate, base arcuate at middle, 

 distinctly sinuate each side with a distinct marginal line, disc convex, closely, 

 hut extremely minutely punctulate, color either entirely pale or with a broad 

 central space darker. Elytra parallel not substriate, closely but indistinctly 

 punctulate, color either uniform testaceous varying to a broad median space 

 darker in color, not reaching the apex. Epiplenrai pale. Body beneath a little 



