H. C. FALL. 145 



bristling hairs in the <? , piceous, joints 2-4 pale; basal joint moder- 

 ately thick, suboval, second joint similar but smaller, third elongate 

 triangular, fourth subtriangular, about as wide as long, 5-10 oval, not 

 much longer than wide, sixth and eighth a trifle smaller ; eleventh 

 ovate pointed, about three-fourths longer than the tenth. Head three- 

 fourths as wide as the prothorax in the 9 , as wide as the prothorax in 

 the d 1 , closely rather coarsely punctate; front bi-impressed. Eyes 

 moderate ( 9 ) , separated by about twice their vertical length ; in the cf 

 much larger, separated by their own length. Prothorax small, one- 

 half wider than long ( 9 ) , widest before the middle, sides rather strongly 

 rounded, margin finely serrulate, disk deeply and broadly transversely 

 impressed along the apical and basal margins, the impressions coales- 

 cent laterally, leaving a transverse discal tumidity, whose summit is 

 a little antemedian in position ; moderately strongly but not densely 

 punctate throughout, the summit of the tumidity somewhat smoother. 

 Elytra very slightly wider at base than the prothorax, and about five 

 times as long, gradually wider behind, their greatest width slightly 

 more than half greater than that of the prothorax ( 9 ) , about twice 

 that of the prothorax in the c? ; closely punctate throughout. Beneath 

 a little more finely punctate, pubescence more recumbent. Legs brown- 

 ish testaceous, thighs dusky. Length, 2.9-3.3 mm. ; width, 1.2-1.6 

 mm. 



California. Bartlett Springs (Fenyes), type; Big Trees, 

 Calaveras County (Blaisdell); Tenino, Wash. (Schwarz and 

 Barber). 



In the male the fifth ventral is truncate and with a shallow 

 rounded emargination at middle ; the sixth smaller and simi- 

 larly truncato-emarginate. In the female the fifth ventral is 

 truncate, the sixth segment is apparenty normally exposed 

 in both sexes. 



D. loiiyior n. sp. 



Very similar to the preceding, but a little more elongate, the pro- 

 thorax smaller, very little wider than the head in the 9 , and scarcely 

 more than half as wide as the elytra in the same sex. In the d 1 the 

 elytra are more than six times as long as the prothorax. Length, 

 3-3.4 mm. ; width, 1.25-1.35 mm. 



Fieldbrook, California (Schwarz and Barber), 

 The form of the fifth and sixth ventrals of the o 71 is the 

 same as in impressicollis ; in the 9 , however, the fifth ventral 

 is less truncate than in the corresponding sex of impressicollis. 



TRANS. AM. ENT. SOC, XXXVI. (19) JUNE, 1910. 



