108 BULLETIN 182, UNITED STATES NATIONAL MUSEUM 



4. THINOBIUS JAMAICENSIS, new species 



Description. — Dark rufocastaneous, pronotum testaceous. Head 

 with the eyes separated from the constriction by less than their 

 length; with coarse but dense granulose sculpture. Pronotum one- 

 half wider than long, nearly semicircular; sculpture as on head. 

 Elytra with inner apical angles rather narrowly rounded; with dis- 

 tinct punctures rather dense and somewhat obscured ; without groimd 

 sculpture. Length, 1 mm. 



Type locality. — Jamaica, roads between Bath and Lower Wliite 

 Horses, by way of Sunning Hill, Trinityville, and Cedar Hill. 



Types.— Ro\oty]iQ, U.S.N.M. No. 52428, collected on February 28, 

 1937, by Chapin and Blackwelder. 



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



Jamaica: Trinityville (Blackwelder station 428). 



Specimens examined. — I have seen only the unique type. 



Remarks. — This is our most distinct species and was for a time 

 confused with Torrentonvus tenehrosus and also with Oxytelus. It 

 agrees perfectly with the diagnosis of Thinohius and appears to be 

 properly placed here in spite of its distinct facies. 



The type was taken flying at dusk. 



5. THINOBIUS EXASPERATUS, new species 



Desc7iption. — Castaneous, the head and abdomen darker. Head 

 with eyes separated by about half their length from base ; with dense 

 fine granulose sculpture. Pronotum, with very fine and rather indis- 

 tinct sculpture ; about one-seventh wider than long, somewhat obtrape- 

 zoidal. Elytra with inner apical angles moderately rounded; with 

 dense sculpture finer than on head but more distinct than on prono- 

 tum. Length, 1 mm. 



Type locality. — Jamaica, roads between Bath and Lower White 

 Horses, by way of Sunning Hill, Trinityville, and Cedar Hill. 



Types. — Holotype and one para type, U.S.N.M. No. 52534, col- 

 lected on February 28, 1937, by Chapin and Blackwelder. 



Records. — The following are the records known to me : 



Jamaica: Trinityville (Blackwelder station 428), Spanish Town (Blackwelder 



station 377). 

 Hispaniola: Dominican Republic, Villa Altagracia (Darlington, in M.C.Z.). 

 Montserrat: ( Blaclcwelder station 265A). 



/Specimens examined. — I have seen two examples besides the types 

 in the United States National Museum, and one in the Museum of 

 Comparative Zoology. 



Remarks. — These specimens appear to be distinct because of the 

 narrow quadrate pronotum. Although I have been unable to separate 

 the specimens, I have not felt justified in making them all paratypes. 



