DYNASTIN.E 203 



small but acute and spiniform; prothorax less abbreviated, three- 

 fifths to two-thirds wider than long, the sides feebly, then gradually 

 before the middle more strongly, converging, the basal angles only 

 moderately rounded from above, the anterior pit rather small but 

 well impressed, smooth, the tubercle well developed ; punctures strong 

 and more or less close-set, becoming smaller and very sparse basally 

 and laterad and generally nearly wanting along the middle posteri- 

 orly; scutellum only moderately transverse, ogival, with a few fine 

 punctures basally at each side; elytra slightly longer than wide, 

 relatively large, inflated behind, almost a third wider than the pro- 

 thorax, broadly rounded at apex; punctures rather small, feebly 

 impressed, not close-set, the regular series not or barely at all im- 

 pressed, becoming fine and confused externally in about apical third, 

 all the punctures internally becoming rather smaller and feebler and 

 sometimes obliterated near the scutellum; hind tibiae stout and 

 flaring, but little more than twice as long as their apical width; 

 last ventral in both sexes with fine and confused but not very close- 

 set punctures. Length (cf 9) 15.0-19.0 mm.; width 9.0-10.9 mm. 

 Common in various parts of southern California. Thirteen examples. 



californicus Csy. 



A Nearly similar but more oblong, less inflated behind, very stout 

 and blackish in color, obscure castaneous beneath, the head a little 

 smaller, the front closely and coarsely punctate, becoming finely, 

 densely scabrous medially; carina approaching the sides more 

 closely; prothorax nearly similar but relatively larger; scutellum 

 more transverse, very obtusely ogival; sparse elytral punctures 

 still smaller, the series wholly unimpressed; apices viewed along 

 the axis of the body transversely arcuate and ascending to the 

 suture, not so nearly horizontal as in californicus; hind tibiae very 

 stout and flaring. Length (d") 17.2 mm.; width 10.35 mm - 



Southern California, Dunn laticollis n. subsp. 



Body less stout and very much smaller in size, similar in the pale color 

 and polished lustre to californicus; head small, closely, asperately 

 punctato-rugose, smooth at base, the carina as in californicus, the 

 clypeus slightly less densely sculptured and more shining, the teeth 

 similar; prothorax much smaller, distinctly less than three-fifths 

 wider than long, similar in general form and sculpture- scutellum 

 similar, only a little wider than long; elytra longer than wide, 

 more parallel, less inflated behind, circularly rounded in apical 

 two-fifths, about a third wider than the prothorax and two and one- 

 half times as long, sculptured nearly as in californicus, the series not 

 in the least impressed; pygidium similarly in great part covered by 

 the elytra; hind tibiae not quite so stout, distinctly more than twice 

 as long as their apical width; ventral segments shorter, the last 

 almost punctureless. Length (cf) 12.0 mm.; width 7.2 mm. 

 Southern California (the locality not recorded), Dunn. 



scitulus n. sp. 



The constancy in form of the bispiculose apex of the clypeus 

 through so many apparently valid species and subspecies, as indi- 



