278 THE CANADIAN ENTOMOLOGIST. 



dorsal ridge. A series of dorsal and lateral depressions, not distinctly- 

 different from the rest of the body in structure or colour, though the lateral 

 ones are slightly darker. The body is thickly covered with little trans- 

 parent granulations. Colour, pale, decidedly whitish green (not yellowish)^ 

 a white line along the subdorsal ridge bordered above with dark green, 

 the lines obsoletely connected on joint 3, but not passing on to the tail. 

 A row of obscure white dashes along the superstigmatal ridge, looking as 

 if beneath the surface of the skin. Spiracles small, round, projecting, 

 white. A faint whitish line separates the clear colourless venter from the 

 body. Head pale green, the mouth parts largely dark brown. It is 

 retracted below, and folded within joint 2, which has the spiracle some 

 what flattened. I^ength of larva 14 mm , width 6.5 mm. 



Food plants of both species of Fackardia, various deciduous trees. 



It may be that P. albipundata is distinct from P. gemi?iata, but the 

 only difference of importance is the colour of the secondaries, which are 

 pale in the latter and nearly black in the former ; but I have not been 

 able to distinguish the larvae. Ocellata and goodellii might be considered 

 as varieties of albipundata with the primaries respectively paler and 

 darker than in the typical form. 



DESCRIPTIONS OF SOME BUTTERFLY LARV^ FROM 



YOSEMITE.— IV. 



BY HARRISON G. DVAR. 



Heterodiroa californica Butler. 



Egg. — Nearly spherical, flattened a little at base ; covered with 

 hexagonal elevated reticulations, from the intersections of which arise 

 short spines. Colour uniform leaf-green, with a silvery lustre ; width 

 1.5 mm. Laid singly at the tip of a leaf on the upper side. Duration of 

 this stage eleven days. 



First larval stage. — Head large, round, flat on the posterior side, 

 roughened with a if^ little tubercles that bear minute setse. Colour pale 

 wood-brown, not sliiny, the mouth parts dark brown and ocelli black ; 

 width I.I mm. Body cylindrical, with short conical tubercles and many 

 minute granulations, each with a minute seta. The subdorsal tubercles 

 on joints 3, 4, 6 and 12 are larger than the others and shaded with 

 blackish. Colour leaf-green, the tubercles and all of joints 12 and 13 pale 



