516 BULLETIN 182, UNITED STATES NATIONAL MUSEUM 



North America: Arizona (Horn, 1877, as inflatus), Aeizona, Texas, Caufoenia 

 (Blackwelder, 1938, as inflatus; U.S.N.M.), Arizona (Hubbard, 1899, as 

 convexua) . 



Specimens examined. — From the West Indies I have seen 10 ex- 

 amples in the United States National Museum, 6 from the Museum of 

 Comparative Zoology, and 3 collected by me in 1935-1937. In addi- 

 tion I have seen numerous examples from North, Central, and Soutli 

 America, including the types of ignavufi and inflatus. 



Remarks. — This species can be distinguished by its size and the un- 

 impressed sides of the elytra. The northern specimens (Cuba, Puerto 

 Rico, Mexico, North America) seem to be uniformly paler than the 

 Trinidad or South American ones, though this may be due in part to 

 the age of the specimens. I can find no other characters to separate 

 them. 



The Puerto Rican examples were collected "under bark of Bucare 

 tree," the Cuban ones "on ceiba" (silk cotton tree), and the Trinidad 

 ones in very old cocoa pods. 



4. COPROPORUS TRINITATIS, new species 



Description. — Rufous, sometimes very feebly picescent in part. 

 Head not distinctly punctate but with minute punctulae; without 

 trace of ground sculpture. Pronotum not distinctly punctate but with 

 very minute punctulae; without trace of strigulae. Elytra rather 

 flattened at the sides but not concave, except for a narrow stria along 

 the upturned margin ; not distinctly punctate or strigulose but with 

 minute punctulae. Abdomen distinctly but rather irregularly punc- 

 tate, with traces of strigulae. Male, eighth sternite with a large some- 

 what rounded triangular emargination about one-third wider than 

 deep; eighth tergite quadridentate, the middle pair separated only 

 half way to base. Female, eighth tergite with six slender lobes, the 

 middle four nearly equal in length but the two middle more triangidar. 

 Length, 1% to 3 mm. 



Type locality. — Trinidad, the Tacarigua River, 2 miles north of 

 Tacarigua or 4 miles northeast of St. Augustine. 



Types. — Holotype, male, and four paratypes, U.S.N.M., No. 52454, 

 collected by me on December 22, 1935. 



Records. — The following is the only record known to me : 



Trinidad: Tacarigua (Blackwelder station 107A). 



Specimens examined. — I have seen only the five types. 



Remmrhs. — This species can be distinguished by its entirely impunc- 

 tate and smooth head, pronotum, and elytra. It resembles rutilus but 

 differs in lacking the elytral concavity. 



The types were found under stones at the river's edoe. 



