CYDNIDAE OF THE WESTERN HEMISPHERE — FROESCHNER 611 



strong, submarginal carina. The prosternal carinae are strongly 

 lobulate in all, but the shape of this lobe varies from a nearly full 

 semicircle to a shape much longer than broad. The sternites may be 

 polished or weakly to strongly alutaceous. The male genital capsule 

 is relatively unmodified in all except that in each it shows a weak, 

 triangular impression subapically and punctate laterally. The 

 length of the body varies from 9.6 to 11.9 mm. 



The taxonomic significance of these variations can only be deter- 

 mined through study of additional material. In the present author's 

 opinion, the variations probably indicate the existence of additional 

 species, but the evidence is not conclusive and it seems best to attempt 

 no further divisions at this time. 



Dallasiellus (Dallasiellus) longulus (Dallas) 



Plate figures 16, 25, 41, 107, 129, 150, 276 



Aethus longulus Dallas, 1851, p. 119.— Walker, 1867, p. 152.— Stil, 1876, p. 26. 

 Stenocoris longulus Signoret, 1880, p. xliv; 1882, p. 242, pi. 8, fig. 102.— Distant, 



1880, p. 5.— Uhler, 1886, p. 3.— Lethierry and Severin, 1893, p. 69. 

 Dallasia longulus Bergroth, 1891, p. 235. 

 Dallasiellus longulus Berg, 1901, p. 281. 



Diagnosis. — The very elongate, parallel-sided form or, more 

 usable, the long labium which surpasses apices of posterior coxae will 

 separate this species from all other members of the subgenus. 



Description. — Male: Elongate, parallel-sided. 



Head (fig. 41): Length about three-fourths width, 1.25(1.20-1.30): 

 1.71 (1.66-1.74); interocular width, 1.04(1.00-1.08); juga rounded, 

 forming a slightly flattened semichcle, as long as clypeus and dis- 

 tinctly narrowing it apically; the marginally carinate jugum has tlu-ee 

 submarginal setigerous punctures — one immediately anterior to eye 

 and two near midlength; surface wealdy convex, faintly rugose 

 radially and with several scattered distinct punctures; ocelh well 

 developed, separated from eye by about twice an ocellar width: 

 jugum ventrally smooth, impunctate; maxillary plate with several 

 distinct punctures, these more abundant posteriorly. Antennals: I, 

 0.38(0.36-0.39); II, 0.46(0.44-0.50); III, 0.43(0.42-0.45); IV, 0.56 

 (0.53-0.60); V, 0.65(0.63-0.68). Bucculae about as high at labial II; 

 labium reaching to first or base of second sternite. Labial segments: 

 I, 0.70(0.68-0.73); II, 1.25(1.16-1.33); III, 1.29(1.20-1.40); IV, 1.03 

 (LOO-1.06). 



Pronotum: Length more than half width, 1.92(L82-1.95) :3.47 

 (3.31-3.62); anterior margin doubly but moderately deeply emargi- 

 nate; side margins entire, with submarginal row of five setigerous 

 punctures, one of which is posterior to transverse impression; latter 

 slightly behind middle, shallow, interrupted medially, marked by 



