COLEOPTERA OF BAJA CALIFORNIA. 389 



Form less than twice as long as wide; sides of thorax arcnately narrowing 

 to base without sinuation; last three joints of antenn;e together nol 

 longer than the preceding joints. 

 Vestitnre of siirface rather dense and of whitish pubescence in great 



^^^'^- gtbbosa. 



Vestiture of elytra not dense, surface not concealed, a whitish border 

 at base and a small white spot at declivity. cristata. 



The antennal character is to a certain extent sexual, 

 the males having the last three joints longer than the fe- 

 males, but as used above (in a secondary position) the 

 antennae are in both sexes longer in tne oblong group 

 than in the shorter forms. The tooth of the claw is more 

 acute in the shorter species. 



The four species above recorded all belong to different 

 faunal Y&gions^gibbosa from the regions east of the Mis- 

 sissippi; sordida, Texas; cristata, from the California 

 region; and scUata, from the Peninsula of California. 



Tripopitys tenuilineata n. sp. 



Cyhndrical, brown, subopaque. Antennae pale, the 

 basal joint piceous. Head moderately closely punctate, 

 sparsely clothed with ochreous pubescence. Thorax 

 broader than long, narrower in front, sides strongly ar- 

 cuate, margin explanate, disc convex, a faint median im- 

 pression and a feeble oblique impression each side reach- 

 ing the base, surface roughly punctate but not densely 

 and somewhat smoother in the impressions, surface 

 sparsely ochreo-pubescent. Elytra moderately closely 

 and irregularly punctate, indistinctly clothed with ex- 

 tremely fine ochreous pubescence which forms fine 

 denser lines extending from the base nearly to the apex, 

 a sutural line, one from the umbone, two between these 

 on the disc, with an oblique scutellar fine, a line external 

 to the umbone. Body beneath paler than above, very 

 finely densely punctured and with extremely fine pubes- 

 cence. Length, .20 inch; 5 mm. 



