CYDNIDAE OF THE WESTERN HEMISPHERE — FROESCHNER 481 



tennal segments : I, 0.30 ; II, 0.23 ; III, 0.36 ; IV and V missing. Labial 

 segments: I, 0.60; II, 0.80; III, 0.66; IV, 0.43. 



Pronotum: Length -width ratio, L80:3.70. 



Scutellmn: Length-width ratio, 2.10:2.23. 



Length of body: 6.00. 



Type data. — The holotype male (USNM 64420), originally in the 

 Uhler collection, is labeled simply "Montevideo," undoubtedly refer- 

 ring to the capital of Uruguay. The allotype female is from the Berg 

 collection and bears the label "Uruguay"; this specimen is being re- 

 turned to the Universidad Nacional de La Plata, where the Berg 

 collection is housed. 



Discussion. — This is the species treated as aethiops by Signoret. 

 His description and illustration of the ten setigerous punctures on 

 the costa prevent such assignment. 



Pangaeus (Pangaeus) xanthopus Signoret 



Plate figures 159, 2366 



Pangoeus [!] xanthopus Signoret, 1882, p. 254. 

 Pangaeus aethiops Lethierry and Severin, 1893, p. 69. 

 Pangaeus uhleri xanthopus Lethierry and Severin, 1893, p. 70. 



Diagnosis. — Either the bicolored legs (especially posterior pair) in 

 which the apex of the femur and the basal third or more of the tibia 

 are contrastingly yellow, or the longer, more slender spines of the 

 posterior margin of the hind tibia (as in fig. 159) coupled w4th the 

 few (not over five) setigerous punctures on the costa will separate 

 this species from all others in the genus. 



Description. — Male: Broadly oval, costae mostly arcuate. 



Head: Length about two-thirds width, 1.05(0.93-1.12) : 1.53 (1.36- 

 1.70); interocular width, 0.91(0.83-1.00); anterior outline a slightly 

 prolonged semicircle, juga as long as or shghtly longer than clypeus 

 and greatly narrowing or contiguous beyond it; surface convex, im- 

 punctate, with number of weak to distinct radiating rugae; jugum 

 with one submarginal setigerous puncture anterior to eye; ocelh large, 

 situated on fine connecting hind margins of eyes, separated from eye 

 by space less than transverse ocellar width; jugum ventrally and max- 

 illary plate, except basal margin, polished, impunctate. Antennal 

 segments: I, 0.28(0.26-0.33); II, 0.22(0.19-0.26); III, 0.38(0.33-0.43); 

 IV, 0.37(0.33-0.43); V, 0.40 (0.36-0.46). Bucculae not as high as 

 labial II, evanescent posteriorly; labium reaching nearly or quite to 

 bases of middle coxae. Labial segments: I, 0.41(0.36-0.43); II, 

 0.59(0.53-0.64); III, 0.52(0.50-0.55); IV, 0.41(0.38-0.46). 



Pronotum: Length about half width, 1.62(1.36-1.90) :3.24(2.79- 

 3.64); anterior margin shallowly, doubly emarginate; lateral margin 

 entire, very weakly arcuate on basal half, with submarginal row of 



501991—60 10 



