CYDNIDAE OF THE WESTERN HEMISPHERE FROESCHNER 511 



Description. — Male: 



Head: Length about two-thirds width, 2.45(2.38-2.58) :3.66(3. 56- 

 3.78); interocular width, 2.30(2.22-2.41); jiigum dorsally polished, 

 with distinct, radiating rugae and numerous minute punctures; juga 

 ventrally irregularly and usually weakly rugulose. Antennal seg- 

 ments: I, 0.79(0.70-1.02); II, 0.54(0.46-0.63); III, 0.95(0.83-1.02); 



IV, 0.97(0.95-1.01) ;V, 0.99(0.90-1.10). Labial segments : I, 1.26(1.22- 

 1.30); II, 1.85(1.78-1.91); III, 1.53(1.45-1.59); IV, 1.07(1.00-1.13). 



Pronotum: Length more than half width, 5.23(4.78-5.57) : 9.48 (8.83- 

 10.10); transverse impression weak but evident across entire width 

 and with numerous crowded, sunken punctures; anterior lobe with 

 numerous (20 or more) moderate punctures laterally; posterior lobe 

 on anterior half with numerous punctures sparser and slightly finer 

 than those of transverse impression. 



Scutellum: Wider than long, 6.21(5.76-6.73) :5.52(5.12-5. 97); disc 

 with numerous, in part contiguous, punctures. 



Propleuron, mesopleuron, and metapleuron: As described for genus. 



Legs and sternites: As described for genus. 



Terminalia: Gonostylus as illustrated (fig. 237). 



Length of body: 15.52(14.40-15.72). 



Female: Rather similar to male, but anterior pronotal impression 

 weaker and less extensive and measurements more variable. 



Head: Length-width ratio, 2.46(2.21-2.60) :3. 63(3.21-3.94); inter- 

 ocular width, 2.29(2.06-2.40). Antennal segments: I, 0.66(0.62- 

 0.70); II, 0.50(0.40-0.60); III, 0.94(0.90-0.96); IV, 0.89(0.83-0.96); 



V, 0.94(0.88-1.01). Labial segments: I, 1.23(101-1.33); II, 1.80 

 (1.63-1.96); III, 1.57(1.46-1.66); IV, 1.09(1.01-1.18). 



Pronotum: Length-width ratio, 4.99(4.35-5.46) :9.35(7.64-10.05). 

 Scutellum: Width-length ratio, 5.88(4.95-6.45): 5.53(4.52-6.00). 

 Length of body: 14.64(12.89-16.18). 



Type data.— The author has not yet located the types which 

 Burmeister described "von Para und Siaras," Brazil. 

 Specimens studied: 8 males, 12 females. 



Brazil: Caviana, Chapada, Corumbd, Rio San Francisco, Saltada Cruzed, 

 Salta Grande, Sao Paulo; May, October to December. 

 Bolivia: Provincia de Sara; November. 

 Paraguay: Horqueta, Villarrica, Trinidad; October to December. 



Discussion. — Burmeister's choice of a name for this species was 

 accurate because some of its individuals are the largest cydnids in 

 the world, both in length and bulk. In size it is rivalled only by 

 the other species of the genus and a few of the larger species of 



Cyrtomenus . 



