j 24 CALIFORNIA ACADEMY OF SCIENCES [Proc. 4th Ser. 



Described from one male taken at Biscayne Bay, Florida, 

 by Mrs. Annie Trumbull Slosson, to whom I take pleasure 

 in dedicating the species. The collection of the California 

 Academy of Sciences contains four specimens of a species 

 that agrees in every particular with Champion's description 

 of hebroides White, taken on the hills back of Oakland, 

 Calif., September 27, 1908. M. foveata Drake, is very 

 close to hebroides but the white marks on the membrane 

 are narrower, the general color is darker and the sulcus on 

 the vertex has an obvious median longitudinal ridge. M. 

 brunnea Drake is paler with the membrane almost uniformly 

 whitish. 



Holotype, male, in collection of the author. 



Type locality, Biscayne Bay, Florida. 



29. Neaethus fragosus, new species 



Related to grossus; longer with the front distinctly longer 

 than broad and the costa much less arcuated toward the 

 base; elytra subopaque as in grossus, the veins more or less 

 infuscated. Length, male 5, female 6 mm. 



Vertex transverse, oblong, on the median line a little more than one-half 

 the length of the pronotum, its anterior margin very obscurely angled ; front 

 oblong, slightly wider at apex, its greatest length a fifth more than the 

 width; clypeus with an obtuse median keel. Pronotum strongly produced 

 anteriorly, much more so than in witripennis. Elytra longer and narrower, 

 than in grossus, in female 3^ by 5 mm., in grossus these measurements are 

 2y 2 by V/ 2 mm., opaque or slightly translucent, not at all transparent as in 

 vilripennis; wings nearly as long as the elytra. Genital plates of male longer 

 and more narrowed at the obtusely angled apex than in grossus. 



Color, yellowish or greenish testaceous, in male usually becoming brownish 

 on vertex and face, with a paler area on apex of front; veins of elytra 

 sometimes distinctly infuscated, especially in the male. 



Described from six males and five females taken by me 

 on the summit of Mt. Wilson near the observatory, Octo- 

 ber 18, 1917. This species is longer and narrower than 

 grossus, with the females distinctly larger and paler than 

 the males. In none of these types is there suggestion of the 

 maculation found in typical grossus. 



Holotype, male, No. 786, and allotype, female, No. 787, 

 Mus. Calif. Acad. Sci.; paratypes also in the Academy's col- 

 lection. 



Type locality, summit of Mount Wilson, Pasadena, Calif. 



