250 rnOCEEDINGS of the national MU'^^ECM. 



of the forms of tlie different collectings are identical, there are now rep- 

 resented in the Mnseum a total of 2S species. P>y careful examination 

 of tliis material 8 forms prove to be identical with sjjccies collected by 

 Barwin, but none of IJolieman's species have been recognized. Of the 

 remaining 20 species 5 are found to have an extended distribution in 

 tropical America, 1 is cosmoi)olitan, and 14 are described as new in 

 the following pages. 



In view of the extreme interest attaching to the biology of these 

 islands, it has been thought advisable to furnish a complete list of the 

 55 coleopterous species so far known to inhabit this archipelago. The 

 percentage of apterous forms is very large, as will be seen by the list; 

 and another peculiar feature is that tliey are generally of a smoother 

 sculpture than their congeners of the continent. Of Waterhouse's 

 species tliat have been rediscovered, a more exjdicit description is 

 given, and for one of them a new genus is proposed. Two new Brazil- 

 ian Coleoptera attracted attention in the course of the work of com- 

 parison and are characterized in footnotes. 



Family CARABIDAE. 



CALOSOMA GALAPAGEIUM Hope. 



Caloi'i>ma galapain'mm Hoi'K, Trans. Ent. tSoc. London, 1837, II, p. 130. 



Form and size of Ci/clirn,s stenostomns, apterous, smooth, and very 

 sh'niug. Head black, impunctate; mandibles jiiceous; labrum and 

 paJpi ferruginous. Antennae ferruginous, slightly darker outward, 

 /inely rufo-pubescent from the fifth Joint, reaching the elytra to one- 

 fourth the length from the base. Thorax black, aeneous at the base, 

 entirely impunctate, slightly wider than long, subcordate, somewhat 

 wider at apex thah at base; disk feebly convex, not depressed at the 

 sides; median line distinctlj^ impressed; basal foveae rounded, deep, 

 approximate to the sides; base truncate; posterior angles -prolonged 

 and deflexed. Elytra at base slightly wider than the thorax at middle, 

 ovate, one-half longer than broad, dark cupreous green; humeri 

 rounded; disk slightly convex, feebly (at the sides and apex obsoletely) 

 punctato-striate; intervals nearly Hat, smooth; the third, seventh, and 

 eleventh with feebly convex, elongate elevations, separated by rounded 

 very shallow foveae, each fovea with a couple of punctures. Epipleura 

 and ventral surface reddish brown, smooth. Legs ferruginous; tibiae 

 sparsely and finely spinose, the intermediate ones strongly arcuate 

 (male), expanded at apex, pubescent beneath and prolonged into a 

 spine as long as the spurs; anterior tarsi (male) with the first three 

 joints strongly dilated and densely spongy beneath, the first .joint cara- 

 panulate, the second widest, quadrate, the third strongly transverse, 

 the fourth short, emarginate, two-thirds as broad as the third, with a 

 few small spines and a trace of sponginess beneath, fifth joint narrow, 

 cylindrical. Posterior coxae oval obtuse. 



