248 Trans. Acad. Sci. of St. Louis. 



rather more than twice as wide as the apex, the median line but very 

 feebly prominent; elytra quadrate, parallel with the sides feebly 

 arcuate, as long as wide, about a third wider and nearly a fourth 

 longer than the prothorax, the elytra and abdomen sculptured as in 

 Echiaster. Male with the sixth ventral broadly rounded at tip, truncate 

 toward the middle, otherwise unmodified; female having the sixth 

 ventral broadly rounded or subangulate at tip. Length 1.7 mm.; 

 width 0.3 mm. Texas (Galveston) to North Carolina (Asheville). 



brevicomis Csy. 



The extreme simplicity of the male sexual characters, as 

 described above, leads me to surmise that the specimens held to 

 represent the male may really be a slightly modified female ; 

 more material will be necessary to decide this however. 

 This species seems to have a very wide distribution, as no 

 differences, even of a varietal nature, can be observed be- 

 tween the original Galveston types and the Asheville speci- 

 mens before me. It is one of the smallest of known Pae- 

 derids. 



NOTES. 



1 — Bibliography is omitted in the present paper for various reasons, but 

 references to the original descriptions, in the case of the older authors, can 

 be obtained from the Munich catalogue, and, to those published between 

 the date of that work and 1883, from the catalogue of Duvivier, issued by 

 the Entomological Society of Belgium. But few species have been de- 

 scribed since the latter date and the bibliographic references of these can 

 be obtained very readily from the Zoological Record. There is one excep- 

 tion, however, which relates to the species of Paederi and Sunii described 

 by Austin, to which I can find no bibliographic reference whatever, either 

 in the Zoological Record or in the catalogue of Duvivier, and I am wholly 

 uninformed as to their place of publication. The representatives of those 

 species in my cabinet have been identified from the original types, which 

 are in the cabinet of LeConte at Cambridge, Mass. 



2 — In the Henshaw list of 1885, one of Kirby's species is appended to the 

 genus Lathrobium under the name puncticolle. I have not been able to 

 consult the original description, but the name may imply some relation- 

 ship with the genus Lobrathium, as a mere surmise. 



ERRATA. 



Page 69 — 6th line from top, for " nineteen " read twenty-six. 

 Page 146 — bottom line, for ** horridnal " read horridnla. 



Issued April 4, 1905. 



