436 WILLIAM G. DIETZ, M.D. 



base tbau the protborax, subtrapezoidal. a little longer than wide, finely striate, 

 punctures concealed by the scales, interspaces wide, three to eight with a row of 

 large, acute tubercles, each bearing a short sets© on its posterior face near the 

 summit, the fourth interspace is tuberculate in its apical third only, the sixth for 

 two-thirds its length ; pygidium perpendicular, small, scaly. Legs densely scaly, 

 femora feebly clavate, tibise not slender, widened towards the apex, tarsi slender, 

 first and second joints elongate, the former longer than the latter, third broadly 

 bilobed, lobes long, fourth joint long and slender, nearly as long as the two pre- 

 ceding joints together, claws bifid. Length 2.5 mm. ; 0.10 inch. 



%, . Last ventral segment with longitudinal fovea; tibiaj unguiculate. 



Hab. — Lo.s Angeles, Cal., on a .species of Ceanothus (Coquillett). 

 Ten specimens, Nat. Mus. coll., are before me. Very closely re- 

 lated to the next species. 



C adjunctus n. sp. — This species entirely agrees with the preceding in 

 form, habitus and the density of its scaly covering and from which it is to be 

 distinguished by the following characters: scales pale, yellowish white. Legs 

 rufo-testaceous, elytral interspaces alternately wider, elytral tubercles confined 

 to the humeral region and the summit of the declivity, several small tubercles 

 near the base of the sixth interspaces, the wider interspaces with some flattened 

 granules, entirely concealed by the scales and scarcely perceptible. Length 2.25 

 mm. ; 0.09 inch. 



"J, . Last ventral segment broadly foveate, tibiae unguiculate. 



Hah. — Utah, Nevada. 



Dr. Hyrn's and Mr. Ulke's collections. A specimen in Mr. Ulke's 

 collection bears the label " C. stanleyi Schwarz." As I am not aware 

 that this species has been described, and all my efforts to ascertain 

 if such has been done have proven of no avail, I am compelled to 

 consider it a nondescript, perfectly willing to renounce authorshij) 

 when the original description may come to light. 



convexicollis group. 



Contains all those species with 7-jointed antennal funicle which 

 have the femora mutic, claws toothed and the elytra at most muri- 

 cate on the declivity. The species are fairly numerous and more 

 closely allied, presenting no special habitus and varying in size from 

 medium to minute. All have the fir.st and second joints of the fu- 

 nicle elongate, former more robust, joints 3-4 shorter, equal, club 

 variable. The males in all have the fifth ventral segment foveate, 

 and the middle and posterior tibite unguiculate at the apex. 



The following analytical table, together with the specific descrip- 

 tions and illustrations, will enable the student to determine his 

 material : 



