CYDNIDAE OF THE WESTERN HEMISPHERE — FROESCHNER 547 



0.60); II, 0.78(0.76-0.83); III, 0.64(0.56-0.70); IV, 0.94(0.90-1.00); 

 V, 1.04(1.00-1.16). Labial segments: I, 0.81(0.76-0.90); II, 1.06 

 (1.00-1.12); III, 0.89(0.86-0.93); IV, 0.57(0.55-0.61). 



Pronotum: Length-width ratio, 2.88(2.78-3.00) : 5.45(5.25-5.67). 



Scutellum: Length-width ratio, 3.51(3.36-3.71) :3.42(3.28-3. 57). 



Length of body: 9.91(9.56-10.14). 



Type data.— Holotype male (USNM 64427) and allotype female 

 (USNM), 10 kilometers northeast of Taxco, Guerrero, Mexico, Apr. 

 4, 1943, W. F. Foshag. Paratypes as follows: 



Mexico: Guerrero: Taxco, same data as types, 11 females (USNM, RCF). 

 Mexico: Tejupilco, June 30, 1933, H. R. Hinton and R, L. Usinger, 2 females 

 (RLU). Michoacdn: 12 miles south of Tzitzio on Huetamo road, July 9, 1947, 

 3 females (RFH). 



Discussion. — The trivial name, brevirostris, is in allusion to the 

 labium reaching only to the middle of the mesosternum and not to 

 the middle coxae or farther as occurs in most species of the family. 



The large size and generally alutaceous dorsal and ventral surfaces 

 suggest that this species might be closely related to the members of 

 the genus Ectinopus, but the lack of a differentiated terminal process 

 on the osteolar peritreme, the presence of three primary setigerous 

 punctures on a jugum, and the complete row of submarginal setigerous 

 punctures on the jugum each would prevent assignment of it to that 

 genus. 



Tominotus brevis (Signoret), new combination 



Plate figures 68, 248 



Aethus {Tominotus) brevis Signoret, 1881, p. 426, pi. 11, fig. 55. 

 Aelhus neotropicus Jensen-Haarup, 1926, p. 49. New synonymy. 



Diagnosis. — The decidedly yellowed tibiae (especially the hind 

 pair), which contrast with the reddish brown femora, will readily 

 separate this species from others in the genus. 



Description. — Male: Based on two specimens. Broadly oval. 



Head: Length nearly two-thirds width, 1.29(1.23-1.36): 1.90(1.86- 

 2.02); interocular width, 1.25(1.20-1.30); juga rounded, forming a 

 semicircle, as long as clypeus, latter with two subapical setigerous 

 punctures; juga with a complete, submarginal, depressed row of 

 coarse setigerous punctures giving rise to stout pegs with a few 

 interspersed ciUa; surface slightly convex, with weak radiating rugae 

 and scattered minute punctures; ocelU small, separated from eyes 

 by more than three times an ocellar width; jugum ventrally and 

 maxillary plate (except posteriorly) impunctate. Antennal segments: 

 I, 0.38(0.36-0.43); II, 0.45(0.40-0.50); III, 0.47(0.43-0.51); IV, 

 0.62(0.58-0.66); V, 0.64(0.60-0.66). Bucculae lower than height of 

 labial II; labium shghtly surpassing middle coxae. Labial segments: 



