NORTH AMERICAN COLEOPTERA. 9 



The larger females of this form resemble those females of ven- 

 tralis in which the sides of the thorax are more or less pale, but in 

 this species there is never a juxta-scutellar spot, on the elytra and in 

 both sexes the labrum is rather differently formed. 



Occurs from Canada and the New England States westward to 

 Wyoming and from these points southward in the entire region east 

 of the Rocky Mountains. 



H. geininatus n. sp.— Oblong, moderately convex, piceous black, clothed 

 with the usual gray or fulvous pubescence, with longer hairs at the margin, 

 elytra with the usual sinuous bands each nearly always broken into three 

 oval spots. Antennae piceous, the basal joint usually paler. Head densely 

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

 the sides oblique, marginal line distinct, entire; disc moderately convex, densely 

 punctulate, color entirely piceous when mature. Elytra parallel 9 , or slightly 

 narrower posteriorly %, disc variably substriate, sometimes indistinctly, as often 

 very evidently, surface densely punctulate, color piceous, the sinuous bands 

 orange yellow, often very indistinct, each usually divided into three oval spots, 

 a marginal spot near apex, another slightly in front of this. Epipleurse piceous, 

 an oblique elevated line near the base ; metasternum with post-mesocoxal oblique 

 line. Body beneath piceous black, more shining than the upper surface, the 

 entire reflexed side of pronotum, tip of prosternal lobe, the sides and apex of 

 abdomen narrowly, yellow. Abdomen densely, finely punctulate. Legs piceous, 

 tarsi alone pale. Length .13 — .25 inch. ; 3.25—6.5 mm. PI. 1, fig. 5. 



3Iale. — Labrum broader than long, slightly narrowed in front, apical margin 

 slightly emarginate at middle and on each side sinuate. Mandibles moderately 

 long, the teeth small. Front slightly retuse behind the labrum. Thorax dis- 

 tinctly wider than the elytra, not narrowed in front. Elytra slightly narrowed 

 from the humeri posteriorly. 



Female. — Labrum scarcely differing from the male, except that it is a little 

 shorter and the sinuations in front less distinct. Mandibles shorter and stouter, 

 the teeth very well developed. Thorax slightly narrower than the elytra, nar- 

 rowed in front. Elytra parallel. 



Variations. — As will be seen by the measurement this species 

 varies considerably in size as well as in the distinctness of the striae. 

 The markings vary greatly. In the greater number of specimens, 

 the bands are completely broken up, in many, however, they are as 

 in the form figured. Immature specimens have not only the bands 

 perfect, but the entire side has a pale border and the epipleurae also 

 pale. In the specimens from the northern regions the vestitui-e is a 

 distinct pubescence, while in those from the south (Los Angeles, etc.) 

 the vestiture approaches that of auromicans. 



In this species the thorax of the male is more convex, and the 

 appearance more massive than usual. The differences between it 

 and ventralis have already been referred to. Some small and slightly 



TKANS. AM. ENT. SOC. XVII. (2) JANUARY, 1890. 



