NORTH AMERICAN HYMENOPTERA. 309 



cisures, smooth, slightly shiBing; color opaque whitish, with a leaden gray tinge. 

 Thorax, suhventral region to spiracles and joint 13 faintly shaded with pale yel- 

 low ; tracheal line evident; a layer of gray-white pigment seems to lie under the 

 skin like a blanket over the dorsal area nearly down to the spiracles. 



Last stage. — Not observed: the larva molted and immediately entered the earth. 



Found on a young leaf of ash {Fraxhui'^') at Keene Valley, N. Y. ; 

 also on the ash at Rouse's Point, N. Y., in June. 



Taxoiius multicolor Norton. Larva. — Head with a gray lateral patch and 

 one at the vertex, shining; width 1 mm. Thorax a little enlarged, feet on joints 

 6-13; segments neatly 6-annulate, not at all shiny; color all sordid white with 

 faint traces of a shaded black subdorsal line ; food showing faintly by trans- 

 parency. 



Next stage. — Head pale brownish, a large square black patch on the vertex, not 

 reaching the clypeus; a lateral patch; mouth brown; head scarcely shining; 

 width 1.4 mm. Body not shining, with a smoky tinge, a very broad olivaceous 

 black subdorsal band, irregular above ; faint blackish marks in impressed spots 

 above the suhventral fold. Feet all pale ; anal plate transverse, black, not 

 shining; two little pale dots on annulet 1 of joint 2 ; a brown shade at apex of 

 clypeus. 



Last stage. — Width of head the same ; translucent and waxy throughout, tinged 

 with vinous and tar-brown, the latter in the folds and on vertex of head. Body 

 shining, smooth, annulate. On acquiring this stage the larvse enter the gi'ound 

 to construct their hibernation cells. 



Sitting flat on the venter on the leaves of the white birch {Betula 

 papyrifera) ; also on the yellow birch {B. lenta). 



Hylotoina »<»ca|>iilari»$ Klug. 



Entirely similar to and indistinguishable from the larva of H. 

 pectoralis Leach, which I have elsewhere described. Feeds on the 

 white birch. 



HylotOEna cseruleiis Norton. 



Also indistinguishable from the larva of H. pectoralis. Feeds on 

 white birch. 



Hy iotoma ;tIcL<eayi Leach (2L). Larva. — Head pale greenish yellow, eye 

 and mouth black ; a dusky black stripe over vertex and ui)per part of clypeus ; width 

 1.8 mm. Thoracic feet large, abdominal small, on joints 6-11, 13. Body segments 

 3-annulate, the obscure shining tubercles greenish, tubercle 1 marked with black 

 on joints 2-4; suhventral ridge very prominent, undulate setiferous; color light 

 green, darker dorsally, with a broad, distinct, pale yelloM' subdorsal band between 

 tubercles 1 and 2 ; spiracles black, suhventral ridge faintly discolored, brownish ; 

 all tubercles setiferous ; line of trachese yellowish. 



Cocoon reticular, of yellow silk, at the surface of the ground, as usual in the 

 genus. 



Found on black birch at Plattsburgh, and on white birch and 

 mountain ash at Keene Valley, N. Y. ; also on Pi/rwi arbutifolia at 



TRANS. AM. ENT. SOC. XXII. SEPTEMBER, 1895. 



