CYDNIDAE OF THE WESTERN HEMISPHERE — FROESCHNER 643 



Hemely tron : Mesocorium hyaline with few punctures near apex; 

 exocorium uniformly and closely punctate across entire width. 



Propleuron: Prosternal carinae anteriorly higher than labial II, 

 bluntly triangular with apex ventrally. 



Legs: Anterior tibia with oblique, premedian, stout spine un- 

 equally furcate, with small, subapical spine on posterior margin; 

 anterior tibia without median angulation ventrally; posterior femur 

 with strong, subapical angulation dorsally, and ventrally with strong, 

 bifid, subapical tooth. 



Terminalia: Gonostylus as illustrated (fig. 289). 



Length of body: 2.52(2.42-2.63). 



Female: Similar to male, but without the secondary sexual 

 modifications. 



Head: Length-width ratio, 0.49(0.47-0.51) :0.63(0.63-0.63); inter- 

 ocular width, 0.34 (0.34-0.35). Antennal segments: 1,0.13(0.13-0.13); 

 II, 0.03(0.03-0.03); III, 0.25(0.24-0.26); IV, 0.23(0.23-0.23); V, 

 0.25(0.25-0.26). Labial segments: I, 0.24(0.23-0.25); II, 0.28(0.28- 

 0.28); III, 0.32(0.31-0.33); IV, 0.23(0.23-0.23). 



Pronotum: Length-width ratio, 0.94(0.88-1.00) : 1.58(1.53-1 .64). 



Scutellum: Length-width ratio, 0.63(0.60-0.66) :0.78(0.70-0.86). 



Length of body: 2.52(2.44-2.60): 



Type data: Sik\ described his species from a female (Stock) from 

 "Rio Janeiro." 



Specimens studied: 3 males, 3 females. 



Brazil: [Rio de Janeiro], F. Sahib., "Typus," 1 female (Stock). Nova Teu- 

 tonia, Santa Catarina, Jan. 4, 1953, May 8, 1952, Sept. 22, 1929, 1952, F. Plau- 

 mann, 3 males, 2 females (JCL). 



Discussion: Van Duzee (1917, p. 23) designated this species as the 

 genotype of St^l's Magoa. 



Amnestus diminuatus Barber 



Amnestus diminuatus Barber, 1939, p. 274, fig. 1. 



Diagnosis. — Among the species with four marginal pegs on the 

 jugum this one may be recognized by its extremely small size (length 

 of body, 1.60) and the very short labium which does not attain middle 

 coxae. 



Description. — Based on the male paratype, the only specimen 

 available for study. Elongate-oval, sides subparallel. 



Head: Length about three-fourths width, 0.34:0.43; interocular 

 width, 0.24; clypeus very slightly surpassing apices of juga but con- 

 tinuing outline; surface with coarse, close punctures, except on trans- 

 versely rugulose clypeus; jugum with four marginal pegs. Antennal 

 segments: I, 0.08; II, 0.02; III, 0.15; IV, 0.13; V, 0.16. Bucculae 



