REVISION OF ELEODIINI BLAISDELL. 485 



I do not consider it in harmony with the Scaurini as defined by 

 Casey." On account of the short, transverse head, with eyes near the 

 prothorax, it is more closely related to the Eiilabini. 



In many respects it is more closely in harmony with Eleodhnorplia 

 than any other heretofore mentioned. 



The genital characters appear to show greater affinity with the 

 Eleodiini. 



(reiiital characters^ male. — Edeagophore oblong-ovate and acutely 

 pointed. Apicale triangular, evenly convex above and acute at apex. 

 Sternite bilobed, lobes separate and united by membrane. 



Female. — Genital segment moderately depressed, subequilaterally 

 triangular, valves more or less reflexed and fully chitinized. The 

 dorsal plate is not at all defined from the apex, surface more or less 

 concave, with scattered setse in apical moiety. The appendage is 

 very small, semi-oval in outline, subapical and feebly penicillate. 

 Superior pudendal membrane moderately exposed and reaching at 

 least to the apical third of the dorsal plate. 



Ventrolaterally the submarginal groove is very feebly defined, the 

 surface lines are straight longitudinally. Internal margins of the 

 valves contiguous in basal half, fissure narrow in apical half; inferior 

 membrane not visible. 



It can be seen by comparing figs. 4, 7, 8, 13, and 14 of Plate 6 

 with those of the different species of Eleodes, and then with figs. 5 

 and of the same plate, that Trocjloderus is more Eleodiinine than 

 Scaurinine. Eidahis agrees with Cerenopus in having the two lobes 

 of the sternite coalescent into one piece, emarginate at apex, and this 

 is distinctly in accord with what appears as true Scaurinine charac- 

 ters. This investigation is in its infancy and not mature for dis- 

 cussion at the present time. 



For the present, at least, I agree with Dr. George Horn in re- 

 taining Trogloderus in the Eleodiini. Future studies might indicate 

 the advisability of separating it, possibly with Eleodim.orpha, as a 

 distinct tribe, and it will indeed be interesting to discover some other 

 closely related species that might indicate its genealogical history. 



General characters. — The profemora are stout and subclavate, oval 

 in transverse section; the tibial grooves are shallow and feebly defined 

 by asperate margins, best defined in the nuiles, but in either sex more 

 or less evanescent toward the base, narrower in costati/s, especially 

 in the males. 



The meso- and metafemora are comparatively slender, slightly and 

 very gradually increasing in width from base to apex, but almost 

 parallel, quite straight, except for the normal curve by which they 

 are adapted to the sides of the body, oval in transverse section ; tibial 



° Auuals N. Y. Acad. Sci., V, Nov., 1890, p. 391. 



