AMERICAN COLEOPTERA. 177 



Ferruginous, head and elytra usually dark piceous: antennae scarcely 

 thicker externally; % sixth ventral acutely incised behind; 4.5—5.6 mm. ; 



Middle States to Vancouver 37. collare 



Smaller and more slender, brown or ferruginous, antennae stouter, thick- 

 ened externally; % fifth ventral slightly impressed and subemarginate 

 behind; .3.5— 4.8 mm.: Middle, Southern and Western States; Kansas. 



28. ambiguum n. sp. 



16. — Brown or ferruginous, head and elytra darker; % sixth ventral feeblv 



impressed, broadly triangularly emarginate behind; i jnm.; Pa. • 



Fla.; Ks 29. ventralc n. sp. 



Ferruginous, abdomen piceous, last two segments ferruginous; elvtra less 

 punctured; % sixth ventral slightly triangularly incised; 3.7 mm.; 



Pa.; S. C; La 30. anale n. sp. 



17.— Testaceous yellow, sides of prothorax with coarse scattered punctures: 

 % sixth ventral with a small broad triangular emarsination at tip; 



3.8 mm.; Pa.; Fla. ; Mich.; Col 31. palliduliiin n. sp. 



Testaceous yellow, dorsal surface of abdomen more or less dusky; head 

 sometimes brown; sides of prothorax with a curved line of punctures; 



.3.7 mm.; Arizona; Texas; two 9 32. lit iiariiim n. sp. 



Ferruginous, head, and frequently the basal half of elvtra black, dorsal 

 segments dusky; % sixth ventral triangularly impressed, broadly emar- 

 ginate behind : fifth slightly notched: 3.7 mm.; Pa.; La.; Fla.; Ks. 



33. (liiiiidiatum. 



I>IPAROCEPHlI.US Maklin. 

 Mr. Ulke has kiudly ,i;lven uie a specimen iroiu Unalaska, which 

 agrees so perfectly with the description of L. brevipennis Maklin. Bull. 

 Mosc. 1853, 192, as to warrant my indicating a second species from 

 California. They may be separated as follows : 



Black above, dark brown beneath; head not wider than prothorax. whicii is 

 but feebly narrowed behind, and not sinuate on the sides; basal ano-les obtuse, 

 rounded; 2.7 mm 1. brevipennis. 



Brown, head wider than the prothorax, which is strongly narrowed behind 

 with the sides subsinuate near the base; basal angles rectangular, verv slightlv 

 rounded; 3.6 mm 2. cordicollis n. sp. 



Of the second species I have one specimen collected at Mendocino 

 California, by Mr. A. Agassiz. Both specimens are males; the sixth 

 ventral segment is bisinuate at the middle of the hind maro-in and 

 fringed with hair in both; but much more strongly in the second; 

 the seventh segment is larger in the first, and flattened alono- the 

 middle in both, with the depression limited by fine elevated margins 

 which curve concavely towards the middlo. 



This is one of the most larva-like Staphylinide genera I have seen • 

 the coxge are large, conical, and scarcely separated either longitudinally 

 or transversely; the elytra are barely half as long as the prothorax, 

 not imbricated, but with the sutural angle much curved. 



TRANS. AMER. ENT. SOC. VIII. (23) JUNE 1880. 



