NO. 137C.. LEPIDOPTERA OF rilK KOOTEXAI hlsTnKT—ItYAJi. 987 



Family TINKIDJ']. 



GRACILARIA ELONGELLA Linnaeus. 



Thirteen .spociiiiens. .June U. July ;;, 4, :>, 7. 14, 15, It'., iiiid one 

 from Mr. Cockle's eollection. May 21>. The larvse oecurred on alder. 

 They formed linear mines on the mider sides of the leuve.s (mkIIhh- in a 

 bladder-shaped enlarovment. The bladder is eontraeted. .sewn up in 

 a line, the leaf rumpled from midrib to maruin. Later thr whole 

 leaf is rolled. 



Larra. — Head liilohed, narrowed l)eliind. luteous. eye l)lack. jaws 

 brown. Body cylindrical, rather short and r()))ust, whitish transhu'ciit, 

 3^ellowish or ureenish from the food, no marks, sliohtly frosted sha- 

 greened. Tubercles invisible, setic tine, pale, shields c-onocolorous; 

 tubercles iv and v closely ap[)r()ximated on the subventral ridge in 

 line, vi present, vii a liair on (he leg ba.se. 



GRACILARIA STIGMATELLA Fabricius. 



One specimen, Jul}' 25 and one from Mr. Cockle's collection. May 

 9. The larva occurred in a blister mine on the upper side of an aspen 

 leaf at the tip. The linear part of the mine is short. l)road, from the 

 midril) outward, the blister large, the upper epidermis onh' separated, 

 white, adhering again in spots when the green color reappears. The 

 larva emerged, .spun up the leaf on the upper side and fed at the ends 

 of the spinning. 



LITHOCOLLETIS POPULIELLA Chambers. 



Nine specimens, Julv 29, August 16. The larva' occurred in blotch 

 mines on aspen and were very numerous at a })oint two miles up Kaslo 

 Creek where the aspens were comj)letely disc«)lored by their mines, 

 ever}' leaf containing several of them. 



LYONETIA SPECULELLA Clemens. 



One hundred and forty si)ecimens. May oO. 31, June V.K "I'l. 23, 26, 

 29 (Bear Lake). The lar\a' were enoi-mously abundant on ('<iiintthH>i 

 early in the season, infesting all the leaves to such an extent that they 

 were destroyed and tlie bushes defoliated. The larv;c hung from the 

 twigs ]>y long threads .so abundantly that tiie liuslies seenunl as if 

 covered with spider's webs on which the larvie hung in rows. They 

 occurred to a less extent on other i)lants, being found occasionally on 

 wild cherry, ap})le, birch, and alder. The larva forms a long, tortuous 

 linear mine, starting from a vein and ending suddenly in a blotch. 

 The frass is in a line at tirst but is ejected fi-om the blotch by hob's. 

 The larva has the feet all present. Cocoons lianuuock-sliaped. slung 

 on th(; back of the slightly curved leaf. 

 Proc. X. M. vol. XX vii— 03 <'A 



