COLEOPTERA OF SOUTHERN CALIFORNIA. 259 



77. Xylophilus nucleus, sp. nov. 



Elongate-oval, subdepressed, brown, prothorax red-brown, legs and an- 

 tennae testaceous; surface moderately shining, pubescence fine, sparse, 

 and recumbent. Head finely, closely punctate, front convex, epistomal 

 suture obsolete; eyes large, not evidently pilose or emarginate, extending 

 to the base of the head, distant on the front by a little more than their 

 own width. Antennae about half the length of the body, not distinctly 

 thickened externally; second joint but little shorter than the first or third, 

 these subequal, the following joints very slightly decreasing in length to 

 the eleventh, which is subequal to the two preceding united. Prothorax 

 small, much narrower than the head, transverse, scarcely narrowed in 

 front, disk deeply, transversely impressed posteriorly; surface closely, 

 rather finely punctate. Elytra elongate-oval, twice as wide at middle as 

 the prothorax, disk obliquely impressed each side near the base, surface 

 finely punctate, the punctures separated by from two to three times their 

 own diameters. Beneath sparsely, finely punctate; middle coxse separated 

 by their own width; ventral segments decreasing slightly in length toward 

 the apex, the last segment a little longer; suture between the first two 

 segments completely obliterated at the middle third, but very distinct 

 laterally. All the legs very slender, the hind femora unmodified; basal 

 joints of hind tibiae equal to the remainder. 



Length, 1-1. 4 mm. 



Two examples taken in the San Bernardino Mountains. 

 78. Xylophilus constrictus, sp. nov. 



Oblong-oval, subdepressed, piceous or piceo-testaceous, antennae and 

 legs paler. Head and thorax finely punctate; elytra more strongly and 

 closely so. Head wide, front slightly convex, epistomal suture distinct; 

 eyes not obviously emarginate or pilose, separated on the front by rather 

 more than twice their own width; tempora scarcely evident. Antennae 

 rather slender, reaching the middle of the elytra; first joint short; second 

 smaller, subglobose, one-half as long as the third; joints three to ten 

 gradually decreasing in length, the eleventh as long as the third. Pro- 

 thorax narrower than the head, transverse, deeply constricted behind the 

 apex, and again, but less strongly so, along the basal margin, the con- 

 strictions in both cases extending entirely across the disk. Elytra oblong- 

 oval, sides broadly arcuate and subparallel, twice as wide at middle as the 

 prothorax. Middle coxae narrowly but distinctly separated, ventral seg- 

 ments slightly decreasing in length, the last a little longer than the pre- 

 ceding; the suture between the first two segments distinct throughout. 

 Legs very slender; basal joint of hind tarsus slightly shorter than the 

 remainder. 



Length, 1.5 mm. 



