SCARAB BEETLES CARTWRIGHT 539 



lower than the geminate series. The minute surface sculpture, in 

 addition to the coarse and fine punctures, is much more noticeable in 

 some specimens tlian others but is quite characteristic. Several have 

 a more or less distinct, impunctate, narrow, longitudinal, median 

 area over the basal half of the pronotuu). The species ranges from 

 24 to 30 mm. in length and 12 to 15 mm. in vvddth. It is quite smiilar 

 to laevicollis (Bates) and subtropicus (Blatchley) but is easily separated 

 from them by the male genitalia and characters given in the key. 

 Bothynus selanderi is named in honor of R. B. Selander, who collected 

 most of the tj^pical series. 



Bothynus subtropicus (Blatchley) 



Ligyrus subtropicus Blatchley, 1922, p. 30. 

 Li gyrus blatchleyi Cartwright, 1944, p. 34. 



Length 21 to 25 mm., width 12 to 14 mm. Oblong, convex, 

 shining rufopiceous to piceous. Clypeus apically bidentate, the 

 upturned, triangular teeth nearly contiguous at base, surface finely 

 moderately closely rugose, the frontal carina represented by two low, 

 widely spaced, more or less conical tubercles; front of head similarly 

 rugose and slightly concave, the rugulose lines breaking to fine punc- 

 tures posteriorly, occiput smooth. Pronotum convex with a low 

 denticle on the anterior margin at middle and a flattened area or 

 shallow depression behind it, the depression about one-third the 

 pronotal length; sides margined, arcuate to acute anterior angles, base 

 sinuate without margin; surface finely punctate over disc and at 

 middle of base and sides, gradually much more coarsely punctate to 

 the anterior and posterior angles, fine punctures at base separated by 

 four or more diameters, coarse punctures in anterior angles generally 

 by one diameter or less, the apical anterior depression rugose-punctate. 

 Scutellum smooth or with a few fine punctures. Elytral sides sub- 

 parallel, surface moderatel}^ coarsely punctate with very fine punctures 

 intemiixed throughout, the coarse, annular punctures of the oblique 

 geminate striae and the intervals between somewhat coarser than those 

 in the wide interval between the first geminate and sutm-al stria, all 

 pimctures finer and closer at sides and apex. Pygidium widely 

 scabriculate-punctate at base and sides, only slightly less so in the 

 female, othenvise shining and smooth with scattered very fine punc- 

 tures, extreme apex virtually impunctate. Underside sparsely hairy 

 anteriorl}^ Apex of piosternal process behind anterior coxae nude, 

 smooth, only slightly convex, with the long, stiff hairs invading the 

 area from sides and rear. Anterior tibia smooth and carinate outside 

 the longitudinal row of coarse, setigerous punctures, claws unmodified. 

 Male aedeagus distinct (see fig. 5d). 



Type: Blatchley collection, Purdue University, Tjafayette, Ind. 



