CYDNIDAE OF THE WESTERN HEMISPHERE — FROESCHNER 387 



the genus; the most outstanding feature bemg that the terminal 

 process stops just short of the lateral margin of the metapleural 

 evaporatorium (fig. 93b, based on Ruckes' sketch of male holotype). 



Type data. — The type series consisted of only the holotype male 

 and allotype female (both in AmM). The type locahty is listed in 

 the original description quoted above. 



Specimens studied. — None. 



Discussion. — The sketches of the evaporatoria do not bear out 

 the statement, in the original description, "Mesosternal evaporating 

 area very large, reaching the lateral margin of the supporting sclorites." 

 The sketches show both the mesopleural and metapleural evaporatoria 

 to be similar to those of indentatus in approaching but not actually 

 attaining lateral margin of segment. 



Rhytidoporus (Rhytidoporus) indentatus Uhler 



Plate figures 5, 32, 52, 92, 124, 146, 193 



Rhytidoporus indentatus Uhler, 1877, p. 380.— Distant, 1880, p. 4. 



Aethus (Rhytidoporus) indentatus Signoret, 1882, p. 38, pi. 2, fig. 80.— Torre 



Bueno, 1939, p. 179. 

 Aethus indentatus Uhler, 1886, p. 3. — Van Duzee, 1917, p. 20.— Barber and 



Bruner, 1932, p. 235.— Barber, 1939, p. 271. 

 Cydnus indentatus Lethierry and Severin, 1893, p. 66.— Banks, 1910, p. 99. 



Diagnosis. — The presence of ocelli and the absence of, or the 

 presence of but a few, coarse punctures immediately posterior to the 

 anterior pronotal emargination sets this species apart from others in 

 the group (fig. 5) . 



Description.- — male: Oval. 



Head: Wider than long, 1.12(1.04-1.30) :0.78(0.73-0.86) ; interocular 

 width 0.66(0.61-0.76) ; surface smooth, with wide, very feeble radiating 

 lines, impunctatc or with a few fine punctures anterior to ocelli; 

 ocellar width 0.06(0.06-0.08); subequal to half of space separating 

 it from an eye, 0.11(0.10-0.13). Antennal segments: I, 0.24(0.23- 

 0.30); II, 0.22(0.20-0.26); III, 0.29(0.24-0.36); IV, 0.37(0.33-0.46); 

 V, 0.51 (0.46-0.56). Labial segments: I, 0.40(0.36-0.46) ; II, 0.59 (0.53- 

 0.70); III, 0.45(0.40-0.53); IV, 0.33(0.30-0.40). 



Pronotum: Wider than long, 2.28(2.08-2.73) : 1.26(1.07-1.43) ; 

 transverse impression near midlength, weakly indicated and usually 

 obsolete at middle; anterior lobe transversely convex, usually with 

 a noticeable triangular impression anteriorly, surface polished, 

 impunctate except for a few punctures behind anterior emargination 

 and usually a variable number near sides; site of transverse impression 

 with an irregular row of fine punctures that are sparse medially and 

 denser laterally; posterior lobe impunctate or with a few widely 



