492 BULLETIN 6.3, UNITED STATES NATIONAL MUSEUM. 



xVfpendage small, flattened, and semi-elli})tical, with tAvo or three 

 short seta? at tip. 



Superior pudendal membrane attaining the apical third of the 

 dorsal jDlate and not rugulose. 



Basal pi'omine?ices not evident. 



Ventrolateral surfaces with surface lines straight when viewed 

 longitudinally, moderately convex transversely; surface glabrous, 

 sparsely punctate apically and feebly concave laterally before the 

 apices, the latter concave beneath. Submarginal groove scarcely evi- 

 dent. Internal margins of the valves contiguous in basal two-thirds, 

 fissure subapical, with margins feebly setose. Membrane not visible. 



Habitat. — California (Los Angeles County). 



Number of specimens studied, 1. 



Monotype a female (Cat. No. 1228(j) in the IT. S. National Museum. 



Type-locality. — Los Angeles County, California; collector, D. W. 

 Coquillett. 



Diaynostic characters.— The tuberculate pronotum, which is some- 

 what dilated at the sides, subserrulate costs? of the elytra, outer 

 three cost-se meeting in a tubercle upon the apex, sufficiently char- 

 acterize this species as distinct. 



The female genital characters, if constant in a series, will also 

 prove of value, as the superior pudendal membrane is unich shorter 

 and not longitudinally rugulose in tuberculatus. 



General obserratioiis. — The mentum is moderate in size and sub- 

 parabolic in outline, obsoletely foveate laterally, and not noticeably 

 scabrous. 



The anlci'ior margin of the prosternum is quite strongly deflexed, 

 tlie surface is gradually and not strongly arcuate l)etween the coxa^, 

 gi'ooved only between the same and mucronate behind. The surface 

 is transversely flattened in front of the coxa^ at middle and very 

 decidedly in contrast to the protuberant condition observed in 

 casta t us. 



The niesostei'uuin is rather nai-rowly and deeply concave and 

 modei'atcly pi'ominent laterally. 



Tlie> metasternum laterally between the coxa? is about as long as 

 the width of a mesotibia at middle. 



The al)d(>iniiial intcrcoxal ])rocess is sulxiuadrate and about as 

 Avide as the nietasternal salient, and as long as the ])ost-c()xal part 

 of the first ventral segment, (|uite equal to the length of the second, 

 which is sul)e(|ual to the thii'd and fourth s(\<>inents taken together; 

 the fourth is about one-half as long as the third. 



The tarsi are rather short and somewhat stout, at least stouter 

 than in the female of costatus before me. 



'J'ai'sal foi'miila : 



T'ro. Mcso. Mela. Mt'talibia. 



Male— 



Female.— H U 1* 3i 



