562 PROCEEDINGS OF THE NATIONAL MUSEUM vol. in 



Specimens studied: 5 males. 



Mexico: Na exact localities: I male (USNM) labeled Ectino-pus holotnelas and 

 Aethus impuncticollis and I male (USNM) labeled Aethus impuncticollis by Linell. 

 Distrito Federal: Lomas de Chapultepec, June 28, 1932, 1 male (RLU). Hidalgo: 

 5 miles north of Tizayuca, Nov. 13, 1946, E. S. Ross, 2 males (CalAc). 



Discussion. — Distant's statement in the original description that 

 the margins of the pronotiim "are sparingly fringed with long hairs" 

 may have been true of his specimens, but the great number of seti- 

 gerous punctures indicate that 20 or more hairs should be present in 

 unrubbed specimen. 



Tominotus inconspicuus, new species 



Plate figure 258 



Diagnosis. — Among those species of the genus which measure less 

 than 6 mm. in length, this one may be recognized by the lack of sub- 

 apical setigerous punctures on the clypeus and the few (two to six) 

 setigerous punctures on the costa. 



Description. — Male: Oval. 



Head: Length about two-thirds width, 0.81(0.80-0.86): 1.29 (1.26- 

 1.37); interocular width, 0.79(0.76-0.83); anterior outline semicircular, 

 clypeus equalling juga, narrowed apically, without subapical setigerous 

 punctures; juga with complete row of submarginal, setigerous punc- 

 tures bearing full row of pegs and few hairs between ; sm'face shining, 

 impunctate or with very few widely scattered, fine punctures; ocelli 

 moderate, separated from eye by space almost twice ocellar width; 

 jugum ventrally and maxillary plate (except basally) shining, im- 

 punctate. Antennal segments: I, 0.24(0.23-0.26); II, 0.24(0.23-0.26); 

 III, 0.29(0.27-0.32); IV, 0.36(0.34-0.39); V, 0.41(0.40-0.43). Buc- 

 culae almost as high as labial II, evanescent posteriorly; labium reach- 

 ing between middle coxae. Labial segments: I, 0.41(0.40-0.43); II, 

 0.64(0.60-0.71); III, 0.50(0.47-0.55); IV, 0.37(0.37-0.38). 



Pronotum: Length about half width, 1.33(1.30-1.40): 2.60 (2.40- 

 2.73); anterior margin moderately emarginate; lateral margins entire, 

 straight on middle third or more, with submarginal row of seven or 

 eight setigerous punctures; transverse impression slightly impressed, 

 obsolete at middle, marked by medially interrupted row of close-set 

 punctures; anterior lobe with large and fine punctures intermixed 

 laterally and in subapical, depressed row; posterior lobe with very 

 widely scattered punctures somewhat more numerous medially. 



Scutellum: Length greater than width, 1.75(1.69-1.88) : 1.65(1. 60- 

 1.71); impunctate basally, discal punctation becoming finer and closer 

 toward narrowed apex. 



Hemelytron : Clavus and corium polished ; clavus with one complete 

 and one partial row of punctures; mesocorium with two rows of punc- 



