CYDNIDAE OF THE WESTERN HEMISPHERE — FROESCHNER 389 



II and III (II varying from two-thirds as long to subequal in length 

 to III). Without intermediates one might be tempted to separate 

 some of these, but as lots bearing the same data often showed these 

 as well as intermediates in varying combinations, the temptation was 

 greatly lessened. The most persistent doubt as to the validity of 

 this lumping was raised by a small series of large specimens from the 

 Dominican Republic and Puerto Rico which shows a more marked 

 impression of the anterior pronotal lobe in both sexes. However, the 

 males of that series show the long mediodorsal projection on the 

 gonostylus that is present in the others assigned here. Some of this 

 material was reported by Barber and Bruner (1932) as indentatus, 

 but their comment that "The males have the anterior disc on the pro- 

 no tum quite plainly depressed" was not true of all males studied, as 

 some of the smaller ones lacked the depression. 



In spite of these tentative conclusions, goodly series of specimens 

 from more localities might validate some sort of separation of some 

 of these variations. 



Wolcott (1936, p. 181) reported this species "at light," "on dung" 

 and "eaten by Ameiva exsul,'' an iguana in Puerto Rico. Later (1948, 

 p. 189) he wrote that it had been collected "From numerous humid 

 localities of coast and mountains" on the same island, and repeated 

 that it was found to be "an item of food of the iguana, ^mm'a exsul." 



Rhytidoporus {Rhytidoponis) obsoletus, new species 



Diagnosis. — Any of several features will separate this species from 

 the others within the genus. The absence of ocelli, the wealdy 

 defined corial areas, the very elongate and slender scutellar apex, or 

 the short membrane may be relied upon. Unfortunately, this form 

 is known only from females so the validity of these characters in 

 relation to the males is purely conjectural. 



Description. — Female (only sex known) : Oval. 



Head: Wider than long, 1.32(1.30-1.33) :0.87(0.86-0.90), inter- 

 ocular width 0.91(0.90-0.93) ; surface smooth, with several very weak, 

 radiating rugae; ocelU absent. Antennal segments: I, 0.28(0.26- 

 0.30); II, 0.32(0.30-0.33); III, 0.36(0.36-0.40); IV, 0.51(0.50-0.53); 

 V, 0.67(0.63-0.70). Labial segments: I, 0.62(0.60-0.66); II, 0.77 

 (0.76-0.80) ; III, 0.63(0.60-0.66); IV, 0.49(0.46-0.50). 



Pronotum: More than twice as wide as long, 1.48(1.43-1.53): 

 0.71 (0.70-0.73) ; transversely convex, smooth, with scattered moderate 

 punctures submarginally to apex and sides of anterior lobe, along 

 obsolete transverse impression and on disc of posterior lobe; side 

 margins with five to seven setigerous punctures, none at basal angles. 



Scutellum: Distmctly longer than broad, 1.17(1.13-1.23) :0.97 

 (0.93-1.03); irregularly punctured over surface except at base and 



