COLEOPTERA OF BAJA CALIFORNIA. 405, 



very black spot, the posterior edge of the triangular spot 

 bordered with black. Body beneath finely cinereo-pubes- 

 cent. Legs black. Length, .35-. 47 inch; 9-12 mm. 



The coloration of the elytra is of a style similar to that 

 of discoidens, but the black is more extended. It differs 

 especiall}^ from that species in having the umbone more 

 elevated and more sharply limited, and by the absence of 

 the four black spots on the thorax which are so constant 

 in our other species. 



San Jose del Cabo. 



Lema flavida n. sp. 



Form of tri/ineata, entirely yellow except the antennae, 

 tarsi, sutural interval and met-episterna, which are piceous 

 black. Head with the usual v-shaped impression and 

 small vertical fovea. Thorax constricted behind the mid- 

 dle, the dorsal transverse impression not deep, disc ante- 

 riorly with a few coarse punctures. Elytra with strise of 

 coarse punctures which become finer toward the apex, 

 the intervals wider than the striee and with a row of dis- 

 tant finer punctures, ninth striae entire. Body beneath 

 very sparsely punctate and slightly pubescent. Length, 

 .24 inch; 6 mm. 



This species resembles trilincata, and differs from it in 

 the absence of the lateral elytral stripe and by the sutural 

 stripe narrower. 



San Jose del Cabo. 



Lema omogera n. sp. 



Shining black, elytra slightly blue with an orange spot 

 at the middle of the base of each elytron extending nar- 

 rowly around the humerus and down the side to the first 

 ventral segment. Head with v-shaped impression with- 

 out vertical puncture, occiput transversely paler. Tho- 

 rax with but few scattered punctures, constricted behind 



