374 BULLETIN 18 2, UNITED STATES NATIONAL MUSEUM 



6. ECHIASTER IMPRESSICOLLIS Cameron 



Echiaster impressicollis Camekon, 1013b, p. 3PkS. — T.kng and Mutchler, 1917, p. 

 198.— SCHEERPELTZ, 1933, p. 1238. 



Description. — Dirty brownish testaceous, abcloirien hl:tcl: ut apox. 

 Head oval, longer than broad, gradually rounded and contracted be- 

 hind the eyes, without trace of posterior angles ; coarsely and rugosely 

 punctured; antennae as long as head, segments 7 to 10 transverse. 

 Pronotum t\\ice as long as broad, widest at middle, gradually nar- 

 rowed in front and behind with all angles obliterated; closely and 

 rugosely sculptured. Elytra not longer than pronotum, very coarsely 

 but not very closely punctate, with intervals smooth and shining; with 

 coarse pubescence. Abdomen with tergites 3 to 6 very coarsely punc- 

 tured and pubescent with intervals smooth and shining; last two 

 segments very finely punctured and pubescent, shining. Length, 

 4 mm. (From Cameron.) 



Type locality. — Grenada, Balthazar. 



Types. — Unique type in the British Museum. 



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



Grenada: (Cameron, 1913; Long and Mutchler, 1917; British Mu.senm). 



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

 British Museum. 



RcTTiarks. — From my study of the type I can record the following 

 to supplement or correct the above description which was rearranged 

 from the original publication: Head exactly one-third longer than 

 wide (length from nuchal constriction to apex of clypeus; width not 

 including eyes) ; labrum divided into four short triangidar lobes 

 w^hich are twice as long as wide at base; sculpture of liead not rugose 

 but composed of closely spaced hemispherical tuberculi instead of 

 punctures or depressions; pronotum almost exactly two-thirds ag 

 wide as long, sculptured as head; elytra exactly as long as pronotum, 

 one-ninth narrower than long ; hind tarsus witli first four segments 

 decreasing gradually in length, first longer than the fifth, filiform; 

 pubescence not at all visible to me. 



At the time I studied the type I made a note that it was probably 

 not congeneric with the other West Indian species of Ecliiaster^ but 

 I am unable now to cite any character that will permit it to be 

 separated. I therefore retain it here until it can be restudied. 



I find no record of its habits. 



LVIII. Genus SPHAERONUM Sharp 



Sphaeronum Sharp, 1876, p. 225. 

 /S'p/iacnwwJH. Suabp, 1870, p. 36. 

 Sphaerinium Casey, 1905, p. 55 (misspelling). 

 Sphaeroniutn Casey, 1905, p. 55 (misspelling). 



