388 PROCEEDINGS OF THE NATIONAL MUSEUM. voi,. xxv. 



deep black .space. Pale reddish or flesh}' mottling's posteriorly on the 

 segments in the incisures. The slight subdorsal warts on joint 2 black. 

 A few black hairs dorsall}" from the obsolete warts i. Traces of a 

 white dorsal line on joints 3 and 4. 



C'ocoon, as usual, of pale-j^ellow silk. Larva? first seen in Mill 

 Gulch, leading- out from the Platte Canyon, later farther down the 

 canyon, but not common. At Sedalia, however, they occurred numer- 

 ously, and had defoliated acres of their food plant. Feeding on the 

 oak, a dwarf tree in this vicinity, but only on the young leaves. 

 Gregarious at first, as usual, but later wandering widely as the young 

 tender leaves become scarce. The larva? form no tent, but spin a 

 slight web over the branches, which becomes a rather distinct mat at 

 the times of moulting. 



This species is nearest to the Californian M. ccmstrlcta Stretch, ])ut 

 quite distinct in the character of the Qgg covering, which, in that 

 species, consists of a great mass of white, frothy varnish. 



Family GEOMETRID.E. 



EUDULE UNICOLOR Robinson. 



E(j(f><. — PwUiptical, evenly rounded, one diameter less than the other, 

 but no tiattenings nor truncation; neither end perceptibl}' depressed. 

 Pale ochraceous, the surface faintly reticulate in whitish, the lines 

 broad, rounded, rather regular, a color, and not an}' perceptible struc- 

 ture; surface ver}^ finely and uniformly granularly shagreened. Skin 

 very delicate, dents in when breathed upon and then flattens out 

 again. Size 0.8 by 0.7 b}^ 0.6 mm. Laid adherent, without threads. 

 The eggs vary in size, some being but half the bulk of others though 

 laid by the same female. Later the eggs turned orange color. 



Stage L — Head rounded bilobed, flat before and rather thin, erect, 

 black. Body slender, greatly elongated, the segments slightly swollen 

 subventrally. Thoracic feet distinct, approximate; abdominal ones 

 small, normal, situated on joints 10 and 13. All pale yellowish, the 

 thoracic feet gray tinted; faint subventral brownish segmentary spots. 

 Tubercles small, black; setre short, dusky, slighth' enlarged at tip. 

 Anal feet with oval blackish shields and a pair of similar convergent 

 shields on the anal flap. A faint, subquadrate, luteous shield subdor- 

 sally on joint 2. Seta? of joints 6 to 13 directed obliquely backward, 

 those of joints 2 to 5, obliquely forward. 



Stage II. — Head rounded, bilobed, erect, free; dull ])rown, blotched 

 with darker in the sutures and sides of lobes; width about 0.5 mm. 

 Body slender, elongate, feet normal, approximate at its extremities. 

 Pale brownish, greenish from the food; a broad blotched, partly faint 

 subdorsal l)rown band; a round dark-brown blotch on tubercle iv on 

 joints 5 to 9 and more faintly on joint 10; tracheal line whitish. 



