Horn.] 4LU LSep. 19, 



finely and irregularly biseriately punctulate. Pygidium sparsely punc- 

 tured, at base finely, at apex coarsely and deeply. Body beneath coarsely 

 foveato-punctate. Legs as in acupunctalus. Length .50 inch ; 13 mm. 



Closely allied to acupunctatus, but opaque, and with the thorax very 

 much more coarsely punctured. Its form is also more robust. 



One specimen in Cab. Leconte, from. 



S. Yuccae, n. sp. 



Black, sub- opaque, depressed. Rostrum nearly as long as thorax, 

 coarsely and deeply punctured at base and gradually more finely to apex. 

 Thorax nearly as broad as long, apex constricted, thence becoming 

 rapidly broader, sides feebly arcuate, at base slightly broader, surface 

 very coarsely punctured, punctures slightly more dense at the sides. 

 Elytra deeply striate, striaj not conspicuously punctured, intervals flat 

 with a single series of moderately coarse, rather closely placed punctures. 

 Scutellum not channelled. Pygidium at basal fourth finely punctured, 

 the remainder coarsely and very deeply punctured. Body beneath more 

 shining than above, coarsely, deeply, and rather closely punctured. 

 Femora coarsely and submuricately punctured. Length .40-. 6 4 inch ; 

 10-16 mm. 



Male. Anterior tibia sub-dentate at basal fourth, densely pubescent on 

 inner side, middle and hind tibke sparsely pubescent, and at basal fourth 

 a short, broad, obtuse tooth. 



Female. Tibise not dentate within, sparsely fimbriate. 



Differs abundantly from any described species by its more depressed 

 form and the interstitial punctuation. 



Occurs in the southern portion of California, and feeds on the Yucca 

 gloriosa, on which plant it is found in the spring, at the base of the 

 flower stalk. Specimens were collected by Mr. \\ r m. M. Gabb, others 

 have been sent by Mr. Jas. Behrens, collected at San Diego. 



Metamasius, n. g. 



The above name is suggested for various species at present retained in 

 Sphenophorus, differing only in the very widely separated anterior coxae. 

 The prosternum is as wide, or nearly so, as the diameter of one of the 

 coxal cavities. The third tarsal joint is broad and densely pubescent 

 beneath as in the first group of the following genus. 



One species occurs in our fauna, although many others probably belong 

 to the genus, among them Sphen. carbonarius, Chevr., from Mexic >. 



M. sericeus Latr. Humb. et Bonp. Voy. I., p. 206, pi. 22, fig. 4; 

 Oliv. Ent. V., 83, p. 84, pi. 28, fig. 409 ; Gyll. Schou. Cen. Cure. IV., 

 p. 896. 



Elongate, feebly convex, opaque. Rostrum rufous, longer than half 

 the thorax, finely punctured at the sides, more evidently punctured at 

 base ; above finely channeled at base and a puncture between the eyes. 

 Thorax red, subopaque, at sides a short black stripe ; at middle an entire 

 broad line, and at base, on each side of middle, a triangular spot black, 



