242 BULLETIN 182, UNITED STATES NATIONAL MUSEUM 



Remarks. — Although very similar to ochracea in all other char- 

 acters I have observed, this species is very distinct by the male struc- 

 ture of the seventh abdominal sternite. The West Indian examples 

 seem to be exactly similar to the oriental ones as figured by Dr. Cam- 

 eron (1931). It has not been possible to associate definitely with 

 these males any of the females of the ocliracea complex. This species 

 belongs in the subgenus LithocJiaris s. str. 



I have collected this species from horse manure and cattle dung, 

 in rotting grass, and flying at dusk. 



2. LITHOCHARIS OCHRACEA (Gravenhorst) 



Paederus ocliraceuK Gravenhorst, 1802, pp. 58, 60. 



Paederus ruhricollis Gravenhorst, 1806, p. 138. 



Sunius rutricollis (Gravenhorst) Stephens, 1829, p. 287. 



Paederus obsctirns Kirby, MS. — Stephens, 1829, p. 287. 



Sunius ochraccus (Gravenhor.st) Stephens, 1829, p. 282. 



Rugilus rubricoJlis (Gravenlioi-st) Mannekheim, 1830, p. 40. 



LUJiocharis ochracea (Gravenhorst) Boisdxjval and Lacokdaire, 1835, pp. 432, 



433. 

 firm ins brnnniccps FAreMAiRE, 1849, p. 290. 

 Lithocharis fastUlio^'^a Paikmaike and Germain, 1801, p. 438. 

 Idthocharis ochrea Summers, 1873, p. 192 (misspelling). 

 Lithocliaris trunniceps (Pairmaire) Fauvel, 1878, p. 66. 

 Medon ocliracea (Gravenhorst) Chyzer, 1885, pp. 10, 19. 

 Metaxijodonta alutacea Casey, 1886a, p. 30. 

 Metaxyodonfa quadricolUs Casey, 1880a, pp. 31, 32. 

 Lithocharis alutacea (Casey) Casey, lSS6b, p. 232. 

 lAthocharis quadricolUs (Casey) Casey, lS86b, p. 232. 

 Lithocharis ruhricollis (Gravenhorst) Seiolitz, 1891, p. 373. 

 Medon (Lithocharis) ochraceus (Gravenhorst) Deville. 1907, p. 141, 149. 

 Medon {Lithocharis) alutacea (Casey) Bernhauee and Schubert, 1912, p. 242. 

 Medon (Lithocharis) brunniceps (Pairmaire) Bernhauee and Schubert, 1912, 



p. 242. 

 Medon (Lithocharis) fastidiosus (Pairmaire and Germain) Bernhauee and 



Schubert, 1912, p. 242. 

 Medon (Lithocharis) quadricolUs (Casey) Bernhauee and Schubert, 1912, 



p. 243. 

 Medon (Lithocharis) ruhricollis (Gravenhorst) Bernhaxier and Schubert, 



1912, p. 243. 

 Medon ( Arthocharis) ochracea (Gravenhorst) Cameron, 1921, p. 372. 



Description. — Color variable but generally as follows : Head black, 

 pronotum, elytra, and abdomen rufous, elytra and abdomen fre- 

 quently clouded with castaneous. Head scarcely wider than long; 

 eyes moderate, separated from base by about their length or a little 

 less; posterior angles very broadly rounded, sides and base not dis- 

 tinct; neck about tv>'0-fifths as wide as head; gular sutures moder- 

 ately separated, straight, converging from apex to base; labrum not 

 distinctly emarginate, with a very small and blunt tooth at middle 

 not projecting beyond the margin but being the end of a feeble ridge 



