OF WASHINGTON. 415 



///. The same, tubercles a little dunky. Width of head, .4 mm. 

 IV, Head, .6 mm. All pale greenish yellow, translucent; tu 

 bercles colorless, setae dusky, normal, without secondary ones. Joint 2 a 

 little collared, 11 and 12 slightly enlarged at the sides. Tubercles conic. 

 rather large; no shields. There is no essential change since stage I. 



Stage V. Head rounded, pale brown, not shining, tuberculin- spots and 

 eyes dark brown, jaws brown; width, i mm. Tubercles i and iii bro:i<IIy 

 black, ii, iv, and v (which are exactly in line subventrally), vi and leg 

 plate concolorous with body. No plates nor shields, the setce of vii dis 

 tributed on the conical slender legs. At the extremities more of the tu 

 bercles are black, on joint 2 including the prespiracular, on 11 to 13 tu 

 bercle ii and on 12, iv also, which is here widely separated from v, though 

 still in line with it. Skin transparent, blood faintly green, food dark 

 green. Body uniform, a little flattened dorso-ventrally, feet equal. Seta; 

 distinct, short, pale, simple. 



Stage VI. Head rather square, rounded, flat before, scarcely bilobed. 

 Very pale brownish, quite heavily spotted with blackish brown, not only 

 on the tubercles but also in clusters at the apex of clypeus, on sides and in 

 ill defined transverse line across upper part of clypeus; width, 1.5 mm. 

 Body short and thick, somewhat flattened, joint 12 slightly enlarged, feet 

 normal. Color translucent whitish, appearing slightly green from the 

 blood, and more strongly so from the food. Tubercles i and iii and most 

 of those at the extremities, and also a varying amount of spotting, black. 

 The spotting begins in subdorsal marks on joints 10 to 12 and 2, and may 

 extend to a complete subdorsal line with a broad gray shade below and a 

 narrow blackish dorsal line, the subdorsal line very heavy on joints n and 

 12. Tubercles distinct, setse rather coarse, pale. Shields not cornified, 

 their tubercles separate and distinct, resembling those on the body. Feet 

 perfectly equal. 



Cocoon. A very frail, slight net of silk on the ground among leaves, etc., 

 but not drawing the material together. 



Papa. Rounded and compact with three movable incisures ; cremaster 

 a low cone without hooks; thorax and cases robust, abdomen smaller, 

 conic. Dark brown, shining, the incisures of abdomen and the extreme 

 tip paler; surface slightly shagreened, not punctured. Length, 5.5 mm.* 



*Dr. T. A. Chapman, to whom the pupa was submitted without any in 

 dication of what species or family it belonged to, writes : "It is a fully 

 obtect form and comes nearest, perhaps, to some Geometrid forms. It is 

 structurally at the same level of evolution as the highest Noctuse andGeo- 

 metra;, that are impossible always to distinguish from one another." Dr. 

 Chapman further expresses some doubt as to whether it is a form that 

 " we generally include in the Macros;" but he cannot tell exactly why 

 he thinks so. That is to say, apparently, that he thinks it essentially a 

 Geometrid, but possessing generalized characters. This opinion is, I be 

 lieve, entirely correct. 



