370 CALIFORNIA ACADEMY OF SCIENCES. 



plaga of irregular form, sending a small branch nearly 

 to the suture, a yellow spot each side of the scutellum, a 

 smaller one posteriorly, one fourth from apex an irregular 

 arcuate band behind which is a small round spot. Body 

 beneath brown bronze, shining, moderately coarsely not 

 closely punctate, the propleural punctures coarser. An- 

 terior margin of prosternum trisinuate and forming each 

 side an obtuse short spine. Surface beneath and legs 

 sparsely clothed with moderatel}'" long whitish hairs. Last 

 ventral with single margin. Length, .52 inch; 13 mm. 



The markings of this species resemble those of Jlavos- 

 ticta Horn (nee -flavosticta || Waterh.) From the char- 

 acters given this species must be placed in the group 

 Acmaeodera^ sinuate (Trans. Am. Ent. Soc. vii, 1878, 

 p. 4), and, while related to fazwmarginata by most of its 

 characters, it seems best placed after cupriiia which is 

 the only species in our fauna with the sub-costiform eleva- 

 tion, although the character is faintly indicated, also, in 

 jJavinnari^iiiata . 



Sierra El Chinche. 



AcMyEODERA STIGMATA n. sp. Plate vii, fig. 2. 



Subcylindrical, nearly of the form of Ptosima luctuosa, 

 dull blue, subopaque, sparsely pubescent, each elytron 

 with a round red spot at the margin one-third from apex. 

 Front feebly convex, not coarsely nor closely punctate, 

 sparsely hairy. Thorax about a half wider than long, 

 sides regularly arcuate from base to apex, side margin 

 narrow and not visible from above, disc convex, a very 

 vague depression at middle of base and a more distinct 

 fovea each side, surface moderately coarsely and closely 

 punctate and sparsely hairy. Elytra nearly parallel, sides 

 narrowed at apical fourth and distinctly serrate, disc con- 

 vex, the stri£e impressed at sides and apex, the punctures 

 moderately coarse and deep, more so at the sides, inter- 



