360 BULLETIN 63, UNITED STATES NATIONAL MUSEUM. 



rronotum somewhat transversely oblong-oval, widest at the middle, 

 and more than a half Avider than long; disc evenly and moderately 

 convex, more or less flattened along- the lateral margins, quite densely, 

 more or less irregulai'ly, and rather coarsely punctate, punctures not 

 confluent, granulate on the impressed sides; apex evenly but not 

 deeply emarginate, more or less obsoletely and finelv margined; sides 

 evenly and broadly rounded, strongly constricted at about basal 

 eighth, thence somewhat oblique, straight, or sinuate to angle, mar- 

 ginal bead thin and rather distinctly roflexed, becoming a mere line 

 on the constriction ; hcise truncate or feebly rounded, not strongly 

 margined, a fifth to a sixth wider than the apex and a little greater 

 than the length; apical angles obtuse and not prominent; basal angles 

 slightly prominent. 



Pro pleura' as in par (mollis. 



Elytra, oval, widest at the middle, a third to a fifth longer than 

 wide; base subtruncate, equal to or distinctly wider than the con- 

 tiguous base of the prothorax; Iimnerl obtusely rounded, sometimes 

 prominent ; sides evenly arcuate, apex somewhat attenuate, not broadly 

 rounded ; dise depressed and moderately convex, strongly but not 

 broadly rounded laterally, inflexed sides oblique and feebly convex, 

 arcuately declivous posteriorly; surface coarsely and irregularly punc- 

 tate, someAvhat foveolately so, punctures quite simple about the suture, 

 series evident centrally Avhen viewed longitudinally, not coarsely 

 muricato-granulate laterally and about apex. 



E pipleuree distinctly dilated beneath the humeri, where the supe- 

 rior margin is usually visible as an arcuate line; otherwise as in 

 parricollis. 



Legs comi^aratively slightly thicker than in parvicollis. 



Otherwise as in parvieollis. 



Male. — Elytra at base scarcely wider than the contiguous pro- 

 thoracic base; humeri scarcely prominent, sides thence evenly arcuate, 

 ai)ically gradually convergent so as to appear somewhat attenaate, 

 the disc being (/radv(dhj arcuately declivious behind. Anterior tarsi 

 Avith the first three joints bearing ])ubescent tufts beneath, the tuft on 

 third joint sometimes obsolete: middle tarsi with the first two joints 

 bearing small tufls at tips beneath. Otherwise as in parvieollis. 



Female. — Illlytra broadly oval; humeri prominent and i-ounded; 

 base comparatively rather broad; sides evenly arcuate. 



Otherwise as in pareieollis. 



Measiirements. — M<des: Length, lo-lO mm.; width, 0.5-7.5 mm. 

 Females: Length, 10-10.5 mm. ; width, 7.8-8.5 nnn. 



Genitfd eharaeters., Tnale. — Eldeagophore and sternite as in pann- 

 collis. 



Fenude. — Dorsal plate sometimes feebly concave and very sparsely 

 setose. Apex chitinous and setose, seta' a little longer than usual and 



