70 CALIFORNIA ACADEMY OF SCIENCES. 



ments; the antennas with second segment subspherical, 

 third pedunculated, fourth the largest; thorax much as in 

 Colpoccphalum; legs, long and hairy ; abdomen of eight 

 (?) segments. The middle of the head and borders of 

 the abdomen yellowish; the rest of the head, thorax and 

 abdominal blotches tawny. 



Genus Trinoton Nitzsch. (Plate xiii.) Body large, 

 from 2 to 6 mm. long; head, triangular, with rounding 

 angles, with projecting rounded temples, and convex ar- 

 cuated occipital margin; antennas, short and concealed, 

 palpi projecting beyond lateral margins of forehead ; eye 

 prominent and emarginated, appearing double; the whole 

 thorax very long, in one species larger than the abdomen; 

 mesothorax separated from metathorax by distinct suture 

 (the diagnostic character of the genus) ; legs long, strong 

 and haired; first segment of tarsus short, with two nar- 

 row and acute lobes, second long with two small lobes 

 near the extremity; abdomen elongate oval, nine seg- 

 ments, the posterior segment being rounded behind in the 

 female and trilobed in the male. Color whitish, with 

 brown or reddish brown blotches and black bands. 



Genus Lcemobothrium Nitzsch. (Plate xiv.) Large 

 species, from 5 to 10 mm. long; body elongate, rather 

 slender; head usually longer than wide, truncate or emar- 

 ginate in front; temples but little swollen with occipital 

 corners angulated; occipital margin deeply concave, with 

 a neck-like prolongation; a large and distinct oral fossa; 

 the mesothoracic suture obsolete, although usually faintly 

 indicated; metathorax separated from abdomen by dis- 

 tinct suture, but of general appearance of an abdominal 

 segment; legs long and strong; first segment of tarsus 

 short with a large lobe; second segment very long and 

 without lobes; abdomen elongate, tapering posteriorly; 

 the ninth segment rounded or truncate. Color varying 



