850 PROCEEDINGS OF THE NATIONAL MUSEUM. vol. xxvii. 



Stage III. — Head green, the paraclypeal tubercles blackish; width, 

 1.1 mm, Bod}^ dark olivaceous green; dorsal and subdorsal lines nar- 

 row, dark edged, lateral wavy, obscure, stigmatal broad, pale; sub- 

 venter oliv'aceous; feet pale; tubercles and seta3 obscure. 



Stage IV. (Green form)— Head green, faintly darker reticulate; 

 width, 1.9 to 2.1 mm. Body uniform, rather slender; joint 12 enlarged 

 dorsall}^ in a low hump which appears brighter l)y its markings. 

 Green, dorsal, subdorsal, and broad stigmatal lines white, dark-green 

 edged, throwing a series of broken green obliques from sulidorsal 

 anterior to dorsal posterior, forming a bar on joint 12. Sides dark 

 marbled, sub venter less so; stigmatal line straight, touching- spiracle 

 except on joints 2 and 12. Feet green; tubercles white obscure. 

 (Brown form) — Head pale brown, heavily recticulate in dark brown, 

 forming an erect stripe on face edging clypeus and median suture. 

 Body brown, reticulate in dark brown, marked as in the other form, 

 but the ol)lique and bounding shades heavier, the light lines nearly 

 completely light brown filled. Tubercles white, but no other white 

 dots. No shields; feet equal. 



Stage V. — Head brown, reticulate in darker and with distinct 

 vertical bands; width, 3.3 mm. Large, robust, equal; joint 12 a little 

 enlarged. Light ocherous brown, with subdorsal blackish shaded 

 oblique bands, squarely terminated on joint 12, fainter on the thorax. 

 Dorsal line rather broad, pale; subdorsal indicated by dark edging 

 lines; sides black recticulate, light, not shaded; substigmatal band 

 yellowish, with a narrow dark edge above; sub venter brown rec- 

 ticulate. Setse small, brown; feet pale; cervical shield darkened, 

 triliueate. 



MAMESTRA TRIFOLII Rottemburg. 



One specimen, much worn, taken August 1 l)y Mr. Cockle. 



MAMESTRA OREGONICA Grote. 



No specimens; one in Mr. Cockle's collection, July 12, 1902. I am 

 inclined to regard this form as distinct from trifolii. 



MAMESTRA ASSIMILIS Morrison. 



Seven specimens, July 6, 8, 25, 30, August 5. The specimens have 

 gra^^er, more diversified wings than the Atlantic region form, which is 

 a smooth black. This is probably a local race, which I leave to be 

 named by some enterprising student. The larva is remarkably pretty. 

 The Kaslo ones were black, but this color is not constant, as I took 

 one on brake {Pteriti) at Shawnigan Lake, on Vancouver Island, in 

 which the ground color was green. The larvae had but five stages. 



Egg. — Spheroidal with flattened base; ribs fine, about 10 around the 

 margin, dimiuishiug by confluence above. Reticulations distinct, both 



