104 CALIFORNIA ACADEMY OF SCIENCES [Proc. 4th Ser 



more distal ones long-cylindrical. Head dark brown, heavily 

 light gray pruinose. 



Pronotum conspicuous light yellow with a narrow dark brown 

 median line. Mesonotal praescutum yellowish-gray with four 

 narrow and rather indistinct dark brown stripes, the intermediate 

 pair longest, only narrowly separated from one another; pseu- 

 dosutural foveae conspicuous, black; scutum and postnotum light 

 gray pruinose; scutellum brown, grayish pruinose, the caudal 

 margin broadly yellowish. Pleura grayish plumbeous, varie- 

 gated with yellowish ; a conspicuous yellowish longitudinal stripe 

 crossing the dorsal margin of the sternum, above the legs, passing 

 ventrad in front of the posterior coxae. Halteres pale. Legs 

 with the coxae obscure yellow, the outer faces slightly infuscated ; 

 trochanters pale; remainder of the legs pale brown, the tarsi dark 

 brown. Wings grayish subhyaline; stigma oval, pale brown; 

 veins dark brown. Venation: Sc ending from two-thirds to 

 three-fourths the length of the long sector, Sc 2 far from the tip 

 of Sci, the latter alone being a little longer than the basal deflec- 

 tion of Cui\ R-2+z comparatively short, from two to two and one- 

 half times Ri alone; r lacking; basal deflection of Cu x at about 

 one-fourth the length of cell 1st M 2 ; vein 2nd A but slightly 



sinuous. 



Abdomen dark brown, the caudal margins of the segments 

 narrowly and indistinctly ringed with paler. 



In its venation, Rhabdomastix californiensis agrees more 

 closely with the type of the subgenus, R. flava (Alex.) than it 

 does with R. monticola (Alex.) of British Columbia. Gonomyia 

 galactoptera Bergr. of Alaska is a member of this genus and 

 subgenus. 



Holotype, male, No. 743, Mus. Calif. Acad. Sci.; E. P. Van 

 Duzee collector, May 22, 1920. 



Type locality, Pleyto, Monterey County, Calif. 

 Tribe Hexatomini 



The writer has explained in another paper (The Crane-flies of 



New York, Part 2, Biology and Phylogeny. Cornell Univ. Agr. 



Expt. Sta., Memoir 38, p. 835, 1921) the necessity for uniting 



the former tribes Limnophilini and Hexatomini. 



Genus Limnophila Macquart 



2. Limnophila pteropoecila, new species 



General coloration, shiny dark brownish-black; halteres pale; 



