INSECTS INJURIOUS TO THE WILLOW. 143 
. Gracilaria purpurilla Chamb. (Larva rolls the leaves from the tip.) 
. Cemiostoma albella Chamb. (Larvee in large blackish blotch mines. 
Chambers, 1. ¢.) 
. Aspidisca saliciella Clem. and Chamb. (Larva in a minute blotch 
mine, from which it cuts out its pupal case. Chambers, I. ¢.) 
. Nepticula fuscotibiwella Clem. (Larva in a linear mine bent back 
in itself. Chambers, l. c.) 
.47. Nepticula. Two unknown species make narrow, linear, crooked 
mines, one of which is in the upper and the other in the lower 
surface of the leaves. (Chambers, l. ¢.) 
. Marmara salictella Clem. Larva burrows in young twigs. (Cham- 
bers, /. ¢.) 
. Batrachedra preangusta (Haworth.) — 
. Batrachedra salicipomonella Clem. 
. Batrachedra striolata Zeller. (The specific distinctness of these three 
species seems to me not sufiiciently established. B. salicipomo- 
nella was bred from galls made by other insects on willows. The 
mode of feeding of the others is not satisfactorily determined. 
Chambers, l. c.) 
. Gelechia salicifungella Clem. 
. Gelechia fungivorella Clem. (Larve of these two species in galls 
made by Cynips. Chambers, l. c.) 
. Gelechia sp.? Imago unknown. The larva sews together willow 
o r=] 
leaves at great elevations in the Rocky Mountains. 
Order DIPTERA. 
The following gall-flies occur on the willow, according to Walsh, who 
gives a synopsis of cecidomyidous galls of the genus Salix in Proceed- 
ings of the Entomological Society of Philadelphia, iii, p. 575. 
55. 
56. 
57. 
58. 
59. 
60. 
. Cecidomyia S. cornu Walsh. (On 8. humilis.) ; 
. Cecidomyia S. siliqua Walsh. (On S. humilis, S. cordata?, and 8. dis- 
Cecidomyia 8S. brassicoides Walsh. (On Salix longifolia.) 
Cecidomyia 8. strobiloides Osten Sacken. (On 8. cordata.) 
Cecidomyia S. strobiliseus Walsh. (On SN. rostrata and 8. discolor.) 
Cecidomyia S. gnaphalioides Walsh. (On 8S. humilis and S. discolor.) 
Cecidomyia S. rhodoides Walsh. (On S. humilis.) 
Cecidomyia S. coryloides Walsh. (On 8. discolor? and S. discolor.) 
color.) 
. Cecidomyia S. nodulus Walsh. (On 8. longifolia.) 
. Cecidomyia 8. triticoides Walsh. (On S. cordata.) 
. Cecidomyia S. hordeoides Walsh. (On S. humilis.) 
. Cecidomyia 8. batatas Walsh. (On 8S. humilis, S. cordata?, and S. dis- 
color ?) 
(. Cecidomyia 8. verruca Walsh. (On 8S. humilis and S. discolor.) 
