344 



PSYCHE. 



[May, 1902 



LIFE HISTORIES OF NORTH AMERICAN GEOMETRIDAE.— XXXII. 



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



Eiichlaena paectinria Den. & Schiff. The 

 mature larva has been described by Packard. 

 Egg. Elliptical, narrower in one diameter 

 as usual, one side a little straighter than 

 the other, giving a suggestion of reniform 

 shape ; micropylar end roundedly truncate, 

 the other not depressed. Reticulations round- 

 edly elevated but with sharply angular 

 crests, regularly hexagonal, some perfect 

 hexagons, the cell areas forming shallow 

 pits ; reticulations large, uniform all over ; 

 pores at the angles in raised whitish cones, 

 absent on the under side. Size i X -6 X .5 

 mm. Later turned sordid pearly pink. 



Stage I. Head rounded, oblique, free, dull 

 grayish luteous, a faint darker band on the 

 side. Body moderate, normal, rather slender, 

 smooth ; gray white, a broad straight, even, 

 purple brown subdorsal band, a little diffusely 

 spreading to joint 2, the pair conjoined into 

 a single dorsal band on joints 10-13. A 

 similarly colored broad ventral band, widened 

 a little on the segments, coloring the feet of 

 joints 10 and 13 in a line ; thoracic feet pale. 

 Tubercles and setae small, dark, obscure. 

 Larvae active and wild. 



Stage II. Head rounded, bilobed, erect, 

 whitish, mottled w-ith browni.sh over the 

 lobes; width .5 mm. Body grayish white, the 

 broad, dark brown, subdorsal bands joining 

 behind as before ; ventral band supplemented 

 by subventral segmentary blotches, diffusely 

 forming a line. Feet pale outwardly. The 

 Subdorsal band is divergently triplicate on 

 joint 2. Tubercles and setae minute. 



Stage III. Head round, erect, gray, 

 streaked with darker dots especially in two 

 lines on each lobe ; width .8 mm. Body 

 moderate, gray, blotched with lighter subven- 

 trally, suggesting diamond-shaped markings 

 and lighter along the subventral fold. No 



distinct marks, only traces of paler lines, 

 rather numerous, fine, the more distinct 

 one a geminate dorsal, somewhat confusedly 

 blotched. Setae minute. 



Stage IV. Head rounded, well bilobed, 

 broad, gray brown, two-thirds of the clypeus 

 and a triangular space on each side of it black 

 edged and trisected by the black clypeal 

 sutures ; rest of head mottled in dark, espe- 

 cially in three, broad, parallel vertical bands, 

 obscurely geminate; width 1.3 mm. Body 

 moderate, normal, the tubercles slightly 

 elevated and the segments subannulate pos- 

 teriorly. Dark gray, faintly longitudinally 

 lined in pale ; very faint darker subdorsal 

 band and blackish dashes anteriorly on the 

 segments above the pale subventral fold; 

 joints 10 to 13 more heavily black shaded. 

 No well defined marks. Tubercles blackish, 

 setae short ; feet concolorous. Anal plate 

 large; a pair of short anal prongs. A dis- 

 tinct short collared elevation appears on 

 joint 5. 



Stage V. Head rounded, slightly bilobed, 

 large, full, oblique; whitish, all the vertex 

 covered with pale gray, mottled blotches, 

 leaving a little white at the sides only ; a 

 broadly low triangular white space, edged 

 with black above, trisected by the clypeal 

 sutures ; epistoma gray; antennae moderate, 

 incurved; width 2 mm. Body moderate, the 

 central segments not quite twice as long as 

 wide ; a dorsal rounded elevation on joint 5 

 composed of two contiguous ellipses bearing 

 tubercle ii of each side ; ii of joint n on a 

 smaller and sharper, but similar elevation. 

 Anal plates rather large, rounded triangular; 

 a pair of subanal prongs. Else smooth, 

 tubercles scarcely elevated, black. Bark 

 gray, mottled in ill-defined shades of cine- 

 reous and reddish ; reddish dorsallv with 



