AMERICAN COLEOl'TERA. 173 



series of 4 punctures, lateral series curved as usual, of 8 — 9 punctures; 

 basal edge sometimes rufo-piceous. Dorsal segments nearly smooth, hind 

 margins piceous; ventral segments dark piceous, li[) rufo-piceous. Length 

 5.2—6.2 mm. 



Abundant in various parts of California. The head of the % 

 Is a little larger and more nearly parallel on the sides than that 

 of the $ . 



C. X. diniidiatns. — More slender than X. picipennis, piceous black, an- 

 teniise and legs dark ferruginous; elytra ferruginous, rather indistinctly finely 

 punctured, blackish for the anterior half. Head moderately convex, about 

 one-half longer than wide, hind angles rounded; upper surface smooth at 

 middle, sparsely and coarsely punctured at the sides; inner frontal grooves 

 long and deep, the outer pair represented by a group of punctures near the 

 eyes; under surface very sparsely and coarsely punctured, lateral edge obtuse 

 much less defined than in X. picipennis. Prothorax oblong with rounded 

 angles, one-half longer than wide, slightly narrowed behind; dorsal series 

 3 — 4 punctured, lateral series 7^9 punctured, curved as usual. Elytra with a 

 dorsal series of fine but regular punctures. Dorsal segments smooth, piceous, 

 hind margins paler; ventral segments more broadly margined with pale 

 [liceous; tip j>ale. Length 6.6 mm. 



San Bernardino, and Mojave Desert, California. I have seen but 

 two specimens, collected by Mr. Crotch. 



7. a. X. f'useiceps. 



3Ir. Fauvel has given this name to a small race of JC. emmesus 

 (4.5 mtii.), which does not seem to differ otherwise. It has an 

 equally wide distribution, being found in the Middle, Western and 

 Southern States. 



8. X. gularis. — Slender, black, antennae legs and elytra dark red, the last 

 distinctly and sparsely but not deeply punctured, almost in rows. Head con- 

 vex, elongate, suboval, rounded behind, very sparsely punctured at the sides, 

 inner frontal grooves long and deep, outer or ocular ones short; under surface 

 with a few scattered coarse punctures, nearly smooth behind. Prothorax elong- 

 ate oblong with much rounded angles, dorsal series of 9 — 10 strongh^ marked 

 punctures, lateral series curved, well defined, of 9 — 10 punctures; between the 

 two and near the front margin is a group of four punctures; likewise some 

 near the front angles. Abdomen dark piceous, dorsal segments finely dis- 

 tinctly punctured; veutral segments more strongly punctured, tip rufo-piceous. 

 Length 7.5 mm. 



Detroit, xMichigan. one specimen, Messrs. Hubbard and Schwarz. 

 Differs from X. obscurus chiefly by the less punctured head, without 

 any trace of a smooth lateral line, which in that species represents 

 the temporal margin of obsidianus, etc. 



9. X. obscurus Er. 



\'aries greatly in size, and has a very wide distribution from Lake 

 Superior and Canada to California. 



