88 PROCEEDINGS OF THE NATIONAL MUSEUM. tol. 57. 



possibly produces a couple of generations a year. The larvae attack 

 the larger trees and these only near the base and usually on the side 

 away from the sun or in spots where the bark is continuously moist. 

 They bore into both the cambium and the rough outer bark, making 

 a short, irregular gallery within which they spin a thin silken cocoon 

 when ready to pupate. On emergence of the moth the pupa skin 

 remains within the cocoon. The mine itself is stained black by the 

 watery frass but is otherwise free of accumulations. While very few 

 trees are uninvested they do not seem to suffer much from the attack 

 and I have never found the larvae in smooth or thoroughly dry bark 

 or anjrv^^here except at the base of the tree. A full description of the 

 larva and pupa follows. 



General characters larva. — (pi. 7, fig. 42; pi. 11, figs. 69, 70, 72, 73). 



As in Dasypyga except as follows: 



Cylindrical; fairly stout. Crochets in a complete circle; triordinal; 

 one of the shortest hooks alternating with each of the longer. Spira- 

 cles slightly oval (nearly circular) in outline; spiracle of 8th abdomi- 

 nal segment larger than that on prothorax. Tubercles heavily chit- 

 inized; prothorax with I la well above the level of la, closely approx- 

 imate to puncture y, puncture y directly dorsad of la, lib nearly on 

 the level of la, remote from Ila, lie nearer to Ic than Ic is to Ih; 

 proleg bearing abdominal segments with // appreciably lower than /; 

 on 8th abdominal segment // considerably higher than /; VII unise- 

 tose on abdominal segments 8 and 9; V, IV and VI of 9th abdominal 

 segment in a vertical line. 



Head somev/hat ovoid; rectangular m outline viewed from above; 

 greatest Vvidth back of middle of head; incision of dorsal hind margin 

 about one-third the width of the head; distance between extremities 

 of dorsal hind margin a little over one-third the width of the head. 

 Frons reaching middle of head; considerably longer than wide; longi- 

 tudinal ridge shorter than frons; adfrontal sutures extending to inci- 

 sion of dorsal hind margin. 



Ocelli / and // approximate; II and /// approximate. 



Frontal seta (Fl) nearer to Adfl thanAdfl is to Adf 2; F2 postero- 

 laterad of PI, on a line Vvdth Fl and Fl; Pa equidistant from ^5 

 and LI; LI forward of the level of Adf 2 or PI; puncture La directly 

 posterior to LI, remote; 01 lying immediatel}^ between Ocelli II and 

 ///, puncture Oa approximate to Ocellus VI, lying between Ocellus 

 VI and 03; puncture SOa lying well within the tria,ngle of the subo- 

 cellar group, equidistant from SOI and SOS and a trifle nearer to 

 them th-QXi to S02 genal puncture {Ga) anterior to the seta {Gl). 



Labrum v/ith median incision rather shallow; Lai and La2 not 

 closely approximate ; Lai on the level of M2 and La2 on the level of 

 Ail; puncture closely approximate to M2. 



