250 MEMOIRS ON THE COLEOPTERA 



than wide, equal in width to the prothorax and two-thirds longer; 

 sutural impressed line obsolete, the stria present at apex as a fine 

 unimpressed irregular groove; surface minutely, sparsely punctate, 

 and, except externally, having distinct though minute and feeble 

 pustule-like elevations; pygidium rather more than three times as 

 wide as long, very smooth, punctured basally as usual. Length 

 (cf ) 29.5 mm. ; width 15.5 mm. Alabama (the locality not recorded). 



sinuatus n. sp. 



Male in fully developed stage larger and much broader than in sinuatus, 

 being nearly as in antceus in size, color and lustre, the head not quite 

 so large, between a third and fourth as wide as the prothorax, the 

 surface and mandibular teeth nearly as in the latter species, except 

 that there are more distinct vestiges of a transverse frontal ridge; 

 prothorax much shorter, two-thirds wider than long, the sides more 

 strongly inflated medially and, anteriorly, becoming much more 

 oblique to the apical sinuation, which is very much more pronounced 

 than in antceus but not quite so deep as in sinuatus; apex relatively 

 narrower than in either and only two-fifths as wide as the base; 

 horns long, slender and erect, proportioned as in antceus, the apical 

 much longer than the posterior and strongly recurved toward the 

 simple acute tip, the posterior erect but with the usual arcuation 

 rather strong; longitudinal ridge similar; surface smooth and 

 polished, rugose only at the sides of the base of the apical, and ex- 

 ternally at the base of the posterior, horns, also with a moderate 

 amount of rugulosity along the basal bead sublaterally; scutellum as 

 usual; elytra fully as wide as the prothorax and three-fourths longer, 

 barely longer than wide, rounded in posterior half, smooth, with 

 minute sparse punctures, the feeble pustulation indistinct; sutural 

 impressed line distinct throughout, becoming a deep and well defined 

 stria in about apical half; pygidium short and broad, shorter than in 

 antceus and with the upper margin more sinuate, approaching the 

 contour seen in Bothymis; irregularly disposed punctures of the hind 

 coxal plate fine. Length (d") 33.0 mm.; width 18.0 mm. Texas. 



semistriatus n. sp. 



8 Male oblong-oval, rather convex, polished, bright castaneous, the 

 under surface not much paler; head two-fifths as wide as the pro- 

 thorax, very short, having discrete punctures, sparse along the 

 middle, closer laterally and, in a large dense patch at each side of the 

 vertex, bearing stiff erect setae; clypeus short, with very oblique and 

 deeply sinuate sides, the apex very acute and distinctly reflexed; 

 middle mandibular tooth broad at base but, about half way up, 

 becoming very slender and thence gradually pointed, the anterior 

 tooth much shorter but also narrower than usual; anterior canthus 

 of the eye unusually large and prominent though obtuse; prothorax 

 short, three-fifths wider than long, the oblique sides anteriorly 

 straight, not at all sinuate; cavity large and deep, half as wide as the 

 pronotum and extending to basal two-fifth?, punctureless but without 

 a longitudinal ridge medially, the postero-lateral processes very 

 short, subcariniform, the apical triangular and elevated, very acute 

 at apex; surface with coarse shallow punctures in the depression, 



