430 CALIFORNIA ACADEMY OF SCIENCES. 



NOTIBIUS COSTIPENXIS 11. Sp. 



Similar in form to IV. opaciis, black, opaque. Head 

 roughly punctured between the eyes, clypeus smoother, 

 broadly emarginate. Thorax broader than long, widest 

 in front of middle, sides arcuate, hind angles distinct, 

 disc moderately convex, punctuation dense and some- 

 what strigose longitudinally, surface very opaque. Ely- 

 tra a little wider than the prothorax, disc convex, deeply 

 sulcate, with a row of coarse ill-defined punctures, inter- 

 vals acutely costiform. Prosternum coarsely not deeply 

 punctured, propleura? longitudinally strigose. Metaster- 

 num at sides coarsely punctate. Abdomen sparsely 

 punctate and more shining. Legs black, alutaceous, 

 not closely submuricately punctate'. Length, .22 inch; 

 5.5 mm. 



Of this species I have seen but two somewhat mutilated 

 specimens, which show no evidence of sexual difference. 

 It resembles sii/catiis, but differs from that in having the 

 thorax distinctly narrower behind, as in opariis, and by 

 the acute el3^tral intervals. 



Mairdalena Island and Lower Purisima. 



Notibius is used in the same sense as in the Class. Col. 

 N. A. or my Revision of the Tenebrionidte. In the Proc. 

 N. Y. Acad. Sciences, v, 1890, Capt. Casey has modi- 

 fied the definition of Conibius and Notibius in such a 

 manner as to cause a rather heterogeneus distribution of 

 the species and requiring the formation of the genus Con- 

 ibiosoma, which is certainl}^ untenable. 



Helops pinguis n. sp. 



Form nearly intermediate between farctiis and ccrciis, 

 castaneous brown (slightly immature?) , the surface faintly 

 bronzed. Antenna^ slender, two-thirds the length of 

 body, joints 4-7 and 8-1 1 equal in length, the last series 



