NORTH AMERICAN COLEOPTERA. 7 



Male. — Antennae very nearly as in jRickseckeri from joint one to 

 five, sixth a little more transverse, seventh nearly three-fourths as 

 long as the eighth, joints eight to eleven as in that 

 species. 



Captured by Mr. James Behrens near Sauzalito, 

 jNIarin County ; also near Berkeley, Cal., by J. J. 

 Rivers. 



The small fovea on each side of the thorax mentioned in the above 

 description is probably not a constant character. A counterpart of 

 it exists in every other species, but is not constant. In jimbriata and 

 Behrensil there is a well marked, short, oblique depression ; in hlrti- 

 collu a vague concavity, while in the other species all trace of it 

 seems to be obliterated by the broad transverse depression. 



The female of this species resembles that of MIcheckeri, but is a 

 little larger and rather more robust. The antennae differ from each 

 4 ^ other in much the same manner that those of the males 

 differ. In the present species the club is truly four- 

 lamellate, the seventh joint more than half as long as 

 the eighth, while in liicheckeri the eighth joint is not longer than 

 the seventh of BehrensU ; joints four to seven are more transverse 

 than in Bickseckeri. 



The original from which LeConte described the female passed 

 again to Mr. Behrens, the one now before me belonging to the Le- 

 Conte cabinet, was collected at Berkeley, Cal., by Mr. J. J. Rivers 

 in the month of May, " nearly dead and too feeble to make a burrow." 



I*, conjiiiigeiis n. sp. — Form rather broadly oval, convex, dorsum slightly 

 flattened, piceous and shining above, beneath brown, fiml)riate at sides and 

 clothed beneath with reddish-yellow hairs. Clypeal lioru deeply triangularly 

 notched, narrowed at base, a slight emargination between it and the lateral pro- 

 cesses, vertical horn emarginate at tip. Thora.K more than twice as wide as long, 

 very similar in form to hirticollis, tlie sides behind the middle nearly straight 

 and divergent, hind angles very distinct, but obtuse, disc not concave in front, 

 surface sparsely finely punctate as in fimhrinta, the jiunctures a little coarser at 

 middle in front, surface entirely without hairs. Elytra a little broader behind 

 the humeri, sutural stria moderately deep, the interval a little broader behind, 

 tbe geminate strije. indicated by rows of punctures, the interspace sparsely 

 punctate, not wrinkled. Legs piceous. Length .92 inch; 23.5 mm. 



Male. — The autennse do not seem to differ appreciably from those 

 of hirticollis. 



At first glance this species would be mistaken for Jimbriata, but the 

 structure of the antennae approaches it to hirticollis, from which it 

 differs by the absence of hairs from the tliorax as well as by the 

 style of punctuation. 



