196 CALIFORNIA ACADEMY OF SCIENCES. [Proc. 3D Ser. 



California one the larva of his Blefharocera ancilla or Li-po- 

 neura yosemite (both described from California). 



New Colorado Larva ( PI. XX, figs. 11 and 12). Short and broad; dorsal 

 aspect blackish, rugose, strongly chitinized; lateral processes long and prom- 

 inent, double, and both members of each pair provided with numerous hairs; 

 the anterior member of each pair longer, angulated, and bearing at its tip a 

 very long, spiny hair; these lateral processes pale fuscous in color; the tracheal 

 tufts composed of six large tubules, three of which project anteriorly and 

 three posteriorly; the ventral suckers unusually large, and larger than in any 

 other Blepharocerid larva yet seen by the writer; the dorsum of the head 

 and thoracic body segment elaborately marked with blackish, brownish and 

 pale fuscous; on under side of this segment a lateral, longitudinal row of 

 three conspicuous pale dots, each with fine black pin-point center; length 

 7 mm. 



These larvse were found in same places as those of 

 Bibiocephala elegantulus, and were quite as common. 



New California Larva (PI. XXII, figs, i and 2). Short and broad; 

 brownish above, elsewhere pale yellowish white, the dorsal aspect of pos- 

 terior body segment also pale yellowish white with blackish posterior margin; 

 lateral processes double, long, and fringed with numerous hairs; the anterior 

 process of each pair longer, not angulated, and darker above than posterior 

 one; these processes longer than in any other Blepharocerid larva known to 

 the writer; antennae unusually long; tracheal tufts composed of four tubules, 

 all projecting anteriorly; length 55-6 nmi. 



These larvse were found scatteringly and rarely in most 

 of the streams, viz., Los Gatos, Campbell, and Alembique 

 creeks, etc., near Stanford University, in which were found 

 Bibiocephala comstocki and B. doanei. 



III. Discussion of the Classification of the 

 North American Species. 



The whole family Blepharoceridse is readily divisible into 

 two groups, of which one, characterized by the absence in 

 its members of a short incomplete vein near the posterior 

 margin of the wing, includes six genera, each represented 

 by a single species, none of which is found in North 

 America north of Mexico. These six genera and their 

 distribution "axq. Afistomyia (Corsica, Cyprus), Haj^alothrix 

 (Monte Rosa, Switzerland), Hammaiorhina (Ceylon), 

 Curi/para (Province St. Catharina, Brazil), Snoivia (Rio 



