SCARAB BEETLES — CARTWRIGHT 537 



tliroughout, scabriculate in corners and across base; male pygidium 

 smooth, shining, minutely punctate apicall}^, widely densely scabricu- 

 late laterally and basally. Underside sparsely hau\y; prosternal 

 process apically smooth and convex anteriorly, posteriorly and 

 laterally clolhed with long stiff hairs. Anterior tibia smooth in front, 

 cariniform outside longitudinal row of coarse, setigerous punctures, 

 scattered shallow, fine punctm-es beyond carina; tai'si normal. Male 

 aedeagus distinct (see fig. 6b). 



Lectotype: British Museum (Natural History). 



Type locality: Acapidco, Guerrero, Mexico. 



Specimens examined: 56. 



Distribution: 



UNITED STATES: "Arizona." MEXICO: Baja California: Cape San 

 Lucas, San Felipe, San Jos6 del Cabo, Santa Rosa. Chiapas: Tapachula (cotype). 

 Guerrero: Acapulco. Nayarit: San Bias. Sinaloa: Mazatldn. 



Remarks: Bothynus laevicollis (Bates) is recognized by the very 

 smooth, shining, first interval of the elytra. There seems to be no 

 doubt that L. bryanti Rivers, described from Baja California, is 

 identical. Dr. E. B. Britton of the British Museum (Natural History) 

 very kindly supplied a cotype of L. laevicollis Bates for study. Wc 

 have a series previously determined as L. bryanti from Baja California. 

 No differences are discernible. The specimen from Phoenix, Ariz., 

 determined as laevicollis by L. W. Saylor is not this species but is a 

 female of the species described in this paper as Bothynus selanderl, 

 new species. 



Bothynus selanderi, new species 



Ligyrus laevicollis Saylor, 1946, p. 44 (not Bates, 1888, p. 316). 



HoLOTYPE male: USNM 63912. Length 28 mm., width 14 mm. 

 Oblong, shining, piceous. Clypeus bidentate, the uptm'iied teeth 

 separated by about their basal width, clypeus and front continuously 

 fmely rugose, the rugae appearing as tiny ridges on a fiat surface, i. e., 

 not declivous on only one side, clypeal carina represented by two very 

 widely spaced conical tubercles, more widely spaced than in laevicollis 

 (Bates), occiput narrowly smooth. Pronotum convex, apicallj'' and 

 laterally margined, base slightly sinuate, without margin, apical angles 

 acute, apical denticle moderate with a shallow depression behind it 

 less than one-fourth the length of the pronotum, a vague smaller 

 depression about half as wide and half as deep on each side of the 

 median depression; surface of median depression rugose, the rugae 

 extending laterally to but not into the smaller depressions which are 

 closely, distinctly punctate within, elsewhere the pimctures are 

 moderately coarse and deep on the disc just behind the median depres- 

 sion where they are separated b}'^ about their diameter, coarser, closer 



