Coleo2')terologieal Notices, III. 143 



scarcely two-fiftlis as long as the body, the joints generally strongly obconical 

 and bnt slightly longer than wide, the third nearly one-half longer than the 

 fourth. Prothorax nearly two-thirds wider than long, the apex truncate, 

 nearly as wide as the base, the latter transverse ; sides bro.adly rounded 

 anteriorly, straight or feebly sinuate and rather strongly convergent thence 

 to the basal angles, which are obtuse and not rounded ; disk much wider 

 slightly before the middle than at base, not noticeably impressed in any part, 

 somewhat coarsely and sparsely punctured, the basal fove?e entirely obsolete. 

 Elytra between three and four times as long as the prothorax, and, at the 

 middle, nearly one-half wider, gradually, evenly ogival at apex ; humeri 

 narrowly rounded, rather broadly exposed, the width at this point distinctly 

 greater than that of the pronotal disk ; sides feebly but distinctly arcuate 

 throughout ; disk rather finely, sparselyand confusedly punctate, with feebly 

 impressed lines and series of punctures toward the suture only. Under surface 

 finely, sparsely punctate. Legs short and unusually robust, the hind tarsi 

 much shorter than the tibiae, with the basal joint not more than three times 

 as long as wide, and but little longer than the next two. Length 4.0 mm. ; 

 width l.(! mm. 



California (Hoopa Valley, Humboldt Co.). 



Easily distinguishable from pubipenvis by its pale color, smaller, 

 more cordate and unimpressed prothorax, much shorter, more robust 

 antennal joints, pale shorter and coarser pubescence, sparser punc- 

 tuation and shorter more robust legs and tarsi. The unique speci- 

 men is a female and the before described type of pubipennis is also 

 of that sex. 



ISOIMIRA Muls. 



Although the species here assigned to Isomira have a community 

 of habitus which decidedly indicates the propriety of associating 

 them together, it is difficult to state any absolutely definitive struc- 

 tural characters. The maxillary palpus varies, in its terminal joint, 

 from the slender form seen in sericea, through the rather broadly tri- 

 angular of pulla, to the form seen in quadristriata. The antennre 

 have the third and fourth joints ecjual in rather more than half the 

 species, but in the remainder the former is much the shorter of the 

 two, sometimes approaching the form seen in Cistela and the Euro- 

 pean antennata. The elytra may be almost completely devoid of 

 impressed strife, or may have more or less feebly impressed rows of 

 punctures as in valida, texana and many of the Central American 

 forms. 



The only character which satisfactorily distinguishes the genus 

 from Cistela, apart from the very pronounced peculiarity of facies, 



