84 GEO. H. HORN, M. D. 



divided. Claws simple, feebly angulated near the base, divaricate. 

 Oaychium entirely wanting. Abdomen of five nearly equal segments 

 in both sexes, the terminal of the male slightly longer. 



The above characters supplement those already given in the books. 

 The body is oblong parallel, pubescent and winged, although the 

 wings in the female are less developed than in the male and probably 

 unsuitable for flight. 



Two species occur both from the Pacific region, distinguished as 

 follows : 



Pubescence above greyish, on the elytra with two irregular darker transverse 

 bands. Third joint of antennae not longer than the fourth Davidsoni. 



Pubescence plumbeous, uniform. Third joint of antennae decidedly longer 

 than the fourth pluiubeilS. 



D. melanophthalnius Guer., should be stricken from our lists, it is 



a native of Santo Domingo. 



I>. Davidsoni Lee. — Form oblong parallel, piceo testaceous or brownish, 

 moderately densely cinereo-pubescent, on the elytra two transverse, sinuous, 

 dentate bands of darker pubescence. Head densely punctulate. Antennae a 

 little longer than half the body, third joint very little longer than the fourth. 

 Thorax twice as wide as long, narrowed in front, apex truncate, base bisinuate, 

 sides arcuate, margin very narrowly depressed, surface densely punctulate. 

 Elytra striate, striae less impressed at base, moderately punctured, intervals 

 alternately slightly broader and more convex, finely punctulate. Body be- 

 neath moderately densely punctulate and pubescent. Length .40 — .52 inch; 

 10—13 mm. 



The males have the last ventral prolonged in an oval manner at 

 middle and sinuate each side; near the base is a vague transverse 

 impression. The female of Davidsoni is unknown to us. 



Occurs in California, in the Upper Sacramento valley. 



D. pluinbeus n. sp. — Form oblong parallel, piceous nearly black, sparsely 

 clothed with fine plumbeous pubescence. Head densely punctured. Thorax 

 nearly twice as wide as long, slightly narrower in front, sides moderately 

 arcuate and feebly explanate, surface densely punctured. Elytra very little 

 wider than the thorax, parallel, narrowed at apical fourth, surface not striate 

 but with rows of coarse deeply impressed punctures which are often longi- 

 tudinally confluent, intervals moderately densely punctulate. Body beneath 

 moderately densely punctulate and clothed with fine plumbeous pubescence. 

 Length % .40— .54 inch; 10—13.5 mm; 9 .80 inch; 20 mm. 

 ■ The female is a larger and more robust form with much less evident 

 elytral sculpture, the punctures being much finer. The disc of the 

 elytra has however five vaguely elevated lines between which the 

 punctuation is somewhat confused. The last ventral is but little 

 longer than the fourth and subtruncate at middle. The elytral sculp- 

 ture of the males primarily distinguishes this species from Davidsoni 



