556 PROCEEDINGS OF THE NATIONAL MUSEUM vol. lu 



Metapleuron: Evaporatorium slightly surpassing middle of segment, 

 lateral margins concave; lateral area with few coarse punctures; peri- 

 treme elongate, becoming evanescent along anterior margin of seg- 

 ment; osteole opening posteriorly in a distinct notch occupied by a 

 small tongue. 



Legs: Moderately long, posterior tibiae slightly curved. 



Sternites: With numerous coarse setigerous punctures irregularly 

 spaced over all but midline. 



Terminalia: Genital capsule polished, coarsely, closely punctate on 

 lateral third or more; gonostylus as illustrated (fig. 251). 



Length of body: 5.74(5.06-6.24). 



Female: Very similar to male, posterior tibiae straight; measure- 

 ments averaging larger. 



Head: Length-width ratio, 1.58(1.50-1.74): 1.06(1.06-1.10); inter- 

 ocular width, 0.99(0.96-1.04). Antennal segments: I, 0.40(0.38- 

 0.43); II, 0.31(0.30-0.33); III, 0.39(0.36-0.46); IV, 0.47(0.46-0.50); 

 V, 0.47(0.46-0.50). Labial segments: I, 0.59(0.58-0.60); II, 0.84 

 (0.76-0.93); III, 0.65(0.62-0.73); IV, 0.49(0.48-0.51). 



Pronotum: Width-length ratio, 3.32(2.90-3.41): 1.77(1.62-1.89). 



Scutellum: Length-width ratio, 2.26(2.08-2.60) :2.25(2.08-2.72). 



Length of body: 6.33(5.68-6.75). 



Type data. — The types (USNM) were originally reported by 

 Uhler from "California, and near San Francisco." 



Specimens studied. — 13 males, 20 females. 



United States: Arizona: Baboquivari Mts., Boyce Thompson Arboretum 

 (Pinal Co.), Catalina Springs, Tempe, Tucson; March to June. California: No 

 exact locality. Utah: St. George, Sevier Bridge Reservoir; March, August. 



Mexico: Baja California: El Rufugio, La Paz, Mesquital, San Ignacio, San 

 Jos6 del Cabo, San Pedro; July. Quinlana Roo: Espfrito Santo Island; June. 

 Sonora: Guaymas; April. 



Discussion. — This very strongly marked species is easily identified, 

 as is attested to b}^ the fact that whenever this name was found 

 attached to a specimen, that specimen was one of this species. 



Tominotus curvipes (Dallas), new combination 



Plate figures 70, 71, 252 



Aethus curvipes Dallas, 1851, p. 114.— Walker, 18G7, p. 152.— St&l, 1876, p. 25.— 



Signoret, 1882, p. 39, pi. 2, fig. 81.— Uhler, 1886, p. 3. 

 Cydnus curvipes Lethierry and Severin, 1893, p. 66. 



Diagnosis. — The large size, polished dorsum, and modified liind 

 tibiae (which in both sexes show a distinct curve in apical third and a 

 flattened space ventrally near base) readily distinguish this species. 



Description. — ^Iale: Oval. 



Head: Length more than half width; 1.59(1.38-1.75): 2.55 (2.28- 



