194 WILLIAM T. M. FORBES 



Mine a yellow blotch on upper or under side of leaves of locust; cocoon flat, 

 oval, yellow, spun outside the mine. 



42. L. tritaenianella Chambers. Thorax and fore wings pale reddish ocherous; 

 two straight white fasciae, a third, sometimes almost divided into opposite streaks, 

 and slightly angulated; an indistinct, whitish, costal streak near the apex. 

 7-8 mm. 



Tentnorm mines on upper side of leaves of hop hornbeam; mine at first blotch- 

 like and speckled, later wrinkled. 



43. L. mariaeella Chambers. Thorax and fore wings golden brown; two white 

 fasciae, one at basal fourth, the other in the middle of the wing; both bent out- 

 ward near the median line and margined inwardly with dark brown; at three- 

 fourths, a curved, white, costal streak meeting a similar dorsal streak; a white 

 streak encloses apex. 8-8.5 mm. 



Missouri. 



Tentiform mines on lower side of leaves of Symphoricarpos orbiculatus. 



44. L. celtifoliella Chambers. Wings reddish saffron, with three, acutely angled, 

 white fasciee, densely dusted internally with dark-brown, which often obscures 

 the white; each of the first two fasciae sending a white streak from its angle 

 almost to the next fascia; the third running into a dusted costo-apical patch; 

 a dorso-apical patch of dark dusting on a white ground; a median basal streak, 

 densely dusted dorsally, this dusting often confluent with a dusted, dorso-basal, 

 white patch. 6 mm. 



Ohio; Kentucky; West Virginia. 



Tentiform mines on underside of leaves of hackberry. 



45. L. fragilella Frey and Boll. Fore wings brownish or deep reddish saffron, 

 with two, outwardly angulated, narrow, indistinct, but complete fasciae at basal 

 fifth and at two-fifths, respectively; a third nearly straight at three-fifths inter- 

 rupted in the middle by a projection from its internal margin; two posterior 

 costal streaks, and a dorsal streak indicated by its margin. The fasciae and 

 streaks margined internally with dark dusting, the margins becoming broad on 

 the costa. Apex dusted. 8.5-9 mm. 



Tentiform mines on underside of leaves of honeysuckle; Lonicera spp. 



46. L. tiliacella Chambers. Head, thorax, and base of wings, except along 

 costa, pure white; middle part of wing to beyond beginning of cilia pale golden; 

 a few golden scales in apex; three white fasciae, the first two straight and dark- 

 margined internally, the third slightly bent and its dark margin interrupted in 

 the middle. 6-7 mm. 



Circular tent mines on upper side of leaves of basswood; mine white, speckled 

 with brown. 



47. L. lysimachieeella Chambers. Named from mine on underside of leaves of 

 Lysimachia lanceolata. 



Group II 



The larva of the flat group is very much depressed, almost flat, with the sides 

 of the segments projecting, thus giving the entire larva a beaded appearance. The 

 head is flat, somewhat triangular in shape, usually of a shining, reddish brown 

 color, with the mouth parts projecting in front. The first three segments of the 

 body are broader than the others and the body tapers toward the posterior end. 

 While the legs are of the same number and occupy the same position as in the 

 cylindrical larva, all are very rudimentary, appearing as small, tubercular pro- 

 jections. On the upper and lower side of most, and sometimes all, of the body 

 segments, are distinctly outlined, shining, darker spots the maculae. These 

 vary in shape on the different segments, being elliptical or trapezoidal, but are 

 constant for a given species in each stage. After the seventh, or last, moult, the 

 larva assumes a more cylindrical shape; the legs are better developed; and the 

 dark maculae gradually disappear. 



