392 CALIFORNIA ACADEMY OF SCIENCES. 



club darker. Thorax as broad at base as long, narrower 

 in front in the ? , surface finely not closely punctate, a 

 smooth median line posteriorly. Elytra more coarsely 

 punctate than the thorax. Body beneath sparsely punc- 

 tate. Legs pale. Length, .05 inch; 1.25 mm. 



Male. — Head smooth, concave, margin of clypeus re- 

 flexed and emarginate, apical edge of thorax at middle 

 reflexed in a short lamina which is emarginate. 



Female. — Front convex, sparsely minutely punctate, 

 minutely alutaceous. Clypeus' and margin of thorax not 

 elevated. 



This species is probably closely related to qtiadricoriiis 

 Ghm., but the description is so brief as to render it un- 

 safe to consider the two identical. 



Coral de Piedra, Sierra el Taste. 



Rhipidandrus peninsularis n. sp. 



Cylindrical, brown, subopaque. AntenniE pale. Head 

 reticulate, densely punctured between the eyes and pu- 

 bescent, clypeus smooth. Thorax broader than long, 

 slightly narrower in front, sides feebly arcuate, disc reg- 

 ularly convex, closely reticulate. Elytra not broader 

 than the thorax at base, broadly sulcate, sulci slightly 

 wrinkled, intervals finely subcostiform. Bod}- beneath 

 very coarsely not closely punctate. Length, .13 inch; 

 3.5 mm. 



The most striking difference between this species and 

 paradoxus is in the form of the antenna?. Li the latter 

 species the joints 5-10 are produced in a long branch, 

 while in the present species the fourth and fifth joints are 

 simply triangular, 6-10 transverse, twice as wide as long, 

 eleventh transversely oval. This structure is the same as 

 that described for Eutomus, a genus at present placed in 

 the Scolytidas. 



