886 PROCEEDINGS OF THE NATIONAL MUSEUM. vol. xxvii. 



flattened. Pale yellow, turning- red; size, 0.9 b}^ 0.6 by 0.5 mm. 

 Laid singly on the flat side on the surface of the leaf. 



Stage I. — Head rounded, bilobed, black. Body moderate, feet 

 equal, joint 12 slightly enlarged, segments annulate. Colorless, the 

 shields concolorous; tubercles small, brown, v higher than iv, no 

 subpriraarics; on joints 11 and 12 tubercle ii is dorsad to i, though 

 not so on joints 5 to 10; sette pointed, pale. 



Stage II. — Head bilobed, white, with rows of gray spots radiating 

 from the clypeus and in l)lotches on the sides; width, 0.7 mm. Body 

 with joints 3 and -1 slightly squarely enlarged, anal feet elevated, joint 

 12 enlarged. Whitish over joints 3 and 4, dorsum and sides infiltrated 

 with luteous gray; subdorsal region, dorsum of joints 2, 3, and 12 and 

 subventral region darker gray. Feet pale, the anal pair dark. 

 Tubercles small, dark; setre moderate. 

 , Stage III. — Head -bilobed, full, flat ))efore, clypeus small; whitish, 

 thickly dotted with black except streaks on faces of lobes and ocelli; 

 width, 1.2 mm. Joint 3 posteriorly enlarged, also joint 12 dorsally; 

 anal feet elevated. Gray-black, washed with white dorsally on joints 

 3 and 4, from there along the sides and in oblique streaks to a geminate 

 white dorsal line. Tubercles small, dark, their bases a little elevated. 

 Seta3 pale, small; feet pale, the anal pair dark. 



Stage IV. — As before, the dots on the head brown; width, 2.2 mm. 

 Body brown, velvet}", washed with white as before, a series of white 

 spots subventrally. Feet verj" pale, white except the anal pair. 

 During the stage the colors became well contrasted and pretty, velvety 

 brown and yellowish-white. 



Stage V. — The colors change entirelj^ to brown like Pt<eudotkyati7'a. 

 Head large, bilobed, squarish, clypeus small; white, thickly dotted 

 with l)rown except in pale streaks in front of lobes, pai'aclypeus smoky 

 brown, cl3^peus dull olivaceous; width, 3 mm. Body moderate, joints 

 3 and 1 a little enlarged dorsally, joint 12 enlarged; dark brown, 

 blackish shaded, reticulate; dorsal line narrow, black with dark oblique 

 shades over two segments to the spiracles, a lighter area along the 

 stigmata, illy defined but conspicuous; feet pale. 



PSEUDOTHYATIRA CYMATOPHOROIDES Guenee. 



Twenty-five specimens; June 13, 18, 19, 25, 27, 30, July 2, 15, 17, 

 21, 26, August 1, 0. They agree with specimens from the Atlantic 

 coast and Pacific region. The larvae were bred on thimbleberry from 

 eggs laid in long strings on the tips of the leaves. The life history 

 has been previously described b}" me.'^' 



«Proc. Boston Soc. Nat. Hist., XXVI, 1895, p. 400; in error as Ilahrosyne scripta. 



