December, igoi] 



PSYCHE. 



287 



except the first, a long one in base of first sub- 

 npica), a spot on th_vi"idiinii before the poste- 

 rior anastomosis and reaching into cell, and 

 a spot in the thyridial cell still nearer the 

 base ; veins dark brown. The first and fifth 

 apical cells extend but little basad of the 

 anastomosis ; the discal cell is a little longer 

 than its pedicel ; the veins at posterior 



anastomosis are disjointed. The bind wings 

 are hyaline, with brown veins, the fourth 

 apical cell nearly as broad as the second, a 

 dot in the base of the third. 

 Length, 13 mm. 



Two specimens from top of Las Vegas 

 range, New Mexico. 



LIFE HISTORIES OF NORTH AMERICAN GEOMETRIDAE. — XXVIII. 



BY HARRISON G. DYAR, WASHINGTON, D. C. 



Eiicrosfis z'lridipcnnatu Hiilst. 



Egff- Elliptical, disk-like, flattened con- 

 cave above and below with sharp edges, one 

 end a little more rounded pointed than the 

 other, narrower, neither perceptibly truncate 

 or depressed. Smooth olivaceous green, 

 shining, with small, narrow and obscure re- 

 ticulations. Size .S X 6 X .35 mm. 



Stage I. Head rounded bilobed, not shin- 

 ing yellowish ochraceous ; width about .3 

 mm., ocelli blnck, mouth brown. Body with 

 a subdorsal point on joint 2 anteriorly, the 

 segment slightly collared; else smooth, 

 cylindrical, moderately elongate, normal. 

 Segments faintly several-annulate, the in- 

 cisures not depressed. A slight rounded stig- 

 matal elevation, most visible on joints .s> 6 

 and 10 Greenish white, a diffuse red-brown 

 dorsal line, narrowed to obsolescence at the 

 ends. Tubercles and setae very small and 

 obscure, the latter very short, black with en- 

 larged tips. Skin minutely shagreened gran- 

 ular. 



Stage II. Head bilobed, the lobes pro- 

 duced into vertical, conical horns, flat before ; 

 yellowish, granular, ocelli black. Body cy- 

 lindrical, uniform, segments not incised, 

 finely granular; a slightly elevated dorsal 

 line. Feet normal, the anal ones with large 

 granular plates. Yellowish white, tinted 

 with brown, the granules and subdorsal line 

 whitish, the anal plates pale edged. Conical 



horns on joint 2 concolorous, granular. Tho- 

 racic feet appressed. No marks, no setae nor 

 tubercles. Anal plate pointed behind. 



Stage III. Head strongly conically bi- 

 lobed, held obliquely forward, pale greenish 

 yellow, granular. Body as before, the cones 

 on joint 2 smaller than the head lobes but 

 similar. Body green, the linear, subdorsal, 

 whitish raised line looped up a little anteriorly 

 on the segments. Pale whitish yellow with 

 a diffuse brown dorsal band obsolete at the 

 ends. Anal plate pointed ; anal feet extended 

 laterally with large plates. 



Stage II'. Head granular roughened, the 

 lobes produced into conical horns, greenish 

 yellow, apices brown, a blackish shade on 

 the outer side of lobes; width i mm. Body- 

 as before, light yellowish green with a faint 

 and diffuse brown dorsal line, obsolete at the 

 ends. Subdorsal raised line as before, whit- 

 ish, obscure. Skin densely pale granular. 

 The long pointed anal shield exceeds the 

 rather high anal leg shields. A dark brown 

 shade subvenlrally on joint 12. Thoracic 

 feet faintly reddish shaded. 



Stage r. Head granular, the high, erect, 

 pointed lobes projecting as far as half the 

 height of the head; whitish green on face, 

 lobes and sides brown shaded, with a few- 

 blackish dots; width 1.4 mm. Body slender, 

 green, angular ac the joints when bent, the 

 cones on joint 2 smaller and slenderer than 



