168 H. C. FALL. 



riorly, surface sparsely granulate. Elytra finely punctate-striate ; intervals with 

 a single line of punctures bearing slightly longer and more erect hairs. Length 

 2.4-3.7 mm. 



Occurs everywhere in our territory. 



GASTRALLUS Duval. 



Form subcylindrical, feebly depressed ; head not visible from 

 above, received in an excavation of the prothorax. Eyes rather 

 small, widely separated. Antennae 9-jointed in our species, 10- 

 jointed in the European species; first joint elongate oval, second 

 similar but smaller, third to fifth smaller and nearly as wide as long, 

 their inner margins not produced ; sixth joint smallest, seventh and 

 eighth elongate-triangular, ninth still longer, narrowly oval, pointed. 

 Terminal joint of maxillary palpi elongate, a little narrowed api- 

 cally, the tip truncate; last joint of labial palpi triangular, nearly 

 equilateral. Prothoracic side margin obliterated, except toward the 

 base. Elytra not wider than the thorax at base, a single fine mar- 

 ginal stria, punctuation confused. Front and middle coxae widely 

 separated, the prosternal process deeply sunk between the coxae. 

 Metasternum oblique, broadly but not deeply longitudinally sulcate. 

 Metasternum not produced anteriorly. First and second ventral 

 segments connate, the first longer than the second at the middle but 

 shorter than it at the sides; third, fourth and fifth segments shorter, 

 increasing in length. Legs slender, the tarsi two thirds to three- 

 fourths as long as the tibiae. 



A single species occurs in our fauna. It was described from Colo- 

 rado, and has recently been taken in California. 



1. C«. margi it i |»<-n ii is Lee. — Piceous brown, finely pubescent, legs and 

 antennae pale. Finely punctnlate throughout, the pronotum and elytra with 

 numerous scattered larger puuetures. These punctures are nearly wanting at 

 the anterior part of the pronotal disk, and are more conspicuous toward the ely- 

 tral base, though evident over the whole surface. The prothorax is moderately 

 narrowed anteriorly, the disk evenly convex ; the side margin is sharply defined 

 and subexplanate posteriorly, but is completely obliterated before the middle; 

 the hind angles rounded but somewhat defined. Elytra with a fine marginal 

 stria which is not obviously punctate. Length 1.9-2.4 mm. 



Colorado (Garland), California (Pomona, Pasadena). 



1 am unable to detect any difference between the Colorado speci- 

 mens and those from California. In the latter State it occurs on 

 oak in June and July, but is not plentiful. Two species of this 

 genus — immarginatus and Icevigatus — occur in Southern Europe. In 

 both the antennae are 10- join ted. 



