REVISIOX OF ELEODIINI BLAISDELL. 119 



middle, very feebly and minutely sinuate just in advance of the 

 posterior angles; apex broadly emarginate, base very broadly and 

 feebly arcuate : anterior angles acute, posterior obtuse, but not at all 

 rounded ; disk moderately convex, minutely granulate, very sparsely 

 and somewhat irregularly punctate, punctures very minute. 



Elytra at base as wide as the contiguous pronotum. Surface mi- 

 nutely and regularly creased, very minutely and strongly granidated, 

 rather feebh^ and minutely pimctate. punctures arranged in regular 

 stria", with a single row of smaller punctures between (Casey). 



Diagnostic characters. — Smooth, very finely sculptiu"ed, the elytral 

 punctures are arranged in widely spaced rows, with rows of smaller 

 punctures between, frequently the serial arrangement is lost and 

 the punctures are irregidar throughout. The anterior femora are 

 mutic in both sexes. 



In extricata the anterior femora are armed in the male, and the 

 elytral sculpturing consists of closely placed series of approxunate 

 punctures, with an interstitial series of more widely spaced punctures, 

 fi-equently the punctures of both series are subequal in size and spac- 

 ing and. as a whole, finer or coarser. The hiuneri are more prominent 

 anteriorly. 



Granulata has the elytra sculptured with rows of more or less 

 elevated and rather smooth, shining tubercles, and the interspaces 

 are opaque. The males have the anterior femora more or less armed. 



Letcheri and randykei are more elongate and in form more like 

 certain smaller Mclancleodts; the pronotal apical angles are never 

 as prominent anteriorly as in the present species. In letcheri the 

 elytra are sparsely clothed with flying hairs, and in randykei as well 

 the elytral sculpturing is subasperate. Colonel Casey writes that 

 the pronotum and elytra are finely granulate, the latter minutely 

 creased as well, but these are microscopical characters only seen under 

 moderately high power and are of no diagnostic value. Such micro- 

 scopical sculpturing can be seen in numerous other species; it is to 

 be observed in extricata. 



The differences of width between the abdominal intercoxal salient 

 and that of the metasternal salient, as observed in arcuata and 

 extricata. are evident, as Casey states, and are good structural dif- 

 ferential points, but are not to be always absolutely relied upon. 



In " extricata the intercoxal salient of the first ventral segment is 

 about as wide as the intercoxal salient of the metasternum. while in 

 aroiata the first is very much wider than the second."" 



I agree with Colonel Casey in considering arcuata a distinct species, 

 although related to extricata. The males of the two species are dif- 

 ferent. The elvtra are more rounded behind as viewed verticallv 



