170 [SEPTEMBER, 
8. D. enescens, subelongatus, cylindricus, nigro-pilosellus, vix subtilis- 
sime cinereo-pubescens, thorace subtransverso, parce punctulato, lateribus et 
angulis posticis valde rotundatis, elytris dorso subdepressis, sat dense grosse 
punctatis. Long. *10. 
San Diego; the male is a little narrower than the female. 
A—b. 
9. D. constrictus, elongatus, eneo-fuscus, subtiliter cinereo-pubescens, 
non pilosellus, thorace latitudine fere longiore, capite vix latiore ante medium 
angustato et paulo constricto, elytris subtiliter punctatis, antennis pedibusque 
rufis. Long. :09. 
San Diego, rare. The sides of the thorax are almost straight, and parallel, 
with the exception of the sinuosity produced by the anterior constriction. 
A—c. 
10. D. canescens, subelongatus, subcylindricus, eneo-niger, irregulariter 
longius cinereo-pubescens, thorace transyerso, lateribus valde rotundatis, serru- 
latis, confertim punctulato, vittis denudatis notato, elytris sat dense punctatis 
maculis denudatis pluribus ornatis. Long. °15. 
Mannerheim, Bull. Mosc. 1843, 248. 
San Jose and San Francisco, very abundant. The description of Mannerheim 
is not at all characteristic. The male is narrower than thefemale; the inferior 
segment of the abdomen is short, and articulates with an anal segment. 
11. D. rotundicollis, elongatus, subcylindricus, eneo-niger, subirregu- 
lariter cinereo-pubescens, thorace rotundato, lateribus serrulatis, elytris dorso 
subdepressis, sat dense grossius punctatis, maculis subdenudatis vix conspicuis 
notatis. Long. +11. . 
San Jose, abundant; the male has the last ventral segment deeply excavated. 
12. D. difficilis, elongatus, subcylindricus, eneo-niger, irregulariter 
cinereo-pubescens, thorace subtransverso, antrorsum angustato, lateribus serru- 
latis valde rotundatis, sat dense punctato, elytris sat dense punctatis, maculis 
indistinctis subdenudatis notatis. Long. :11. 
San Jose. Very similar to D. canescens, but the thorax is less transverse, 
and less thickly punctured; the spots on the elytra are Jess distinct; they form 
three transverse bands and a mark at the base. ‘The male has the last ventral 
segment small and canaliculate;-it articulates with an anal segment. 
13. D. senilis, elongatus, dense cinereo-pubescens, eneo-piceus, thorace 
opaco punctulato, subquadrato, antrorsum subangustato, lateribus serrulatis vix 
rotundatis, elytris confertim subtilius punctatis. Long. 13. 
Fort Laramie, Nebraska Territory. 
14. D. obscurellus, subelongatus, niger vix wenescens, subtilissime vix 
conspicue cinereo-pubescens, capite thoraceque alutaceis, parce punctatis, hoc 
rotundato, serrulato, convexo, elytris thorace latioribus, dorso vix depressis, sat 
dense grossius punctatis. Long. :09. 
San Diego, one specimen. Resembles in form D. rotundicollis, but is smaller, 
and with the pubescence scarcely visible. 
15. D. luteipes, eneus, elongatus, subcylindricus, longe inzqualiter 
cinereo-pubescens, thorace non transverso, convexo punetato, lateribus serrulatis 
rotundatis, antrorsum subangustato, elytris grossius distinecte punctatis, dorso 
non depressis, maculis subdenudatis atris notatis, antennarum basi pedibusque 
tufo-flavis. Long. °1. 
One specimen, San Diego. 
16. D. pusillus, eneo-niger, oblongo-elongatus, parcius longe cinereo- 
pubescens, thorace opaco, confertissime ruguloso, transverso, lateribus subser- 
