22 



have been made are, lintneri which occurs only in the eastern part of 

 the United States and Canada, ortholobis which is a western species 

 and longiloba which is found only in Texas. Specimens of ortholobis 

 have been taken, however, from Missouri and Kansas and this fact 

 has tended to make the identity of salicis-nigrae less certain ; yet the 

 weight of evidence leads to the conclusion that the species now 

 before me is really identical with that described by Walsh. 



CHIONASPIS LINTNERI. 



Chionaspis lintneri Comstock, Second Rep. Dept. Ent. Cornell Univ. 



Expt. Sta., p. 103(1883). 



Chionaspis Lintneri Cockerell, Can. Ent., Vol. XXVII., p. 33 (1895). 

 Chionaspis Lintneri betulae Cooley, Can. Ent., Vol. XXX,, p. 85 (1898). 

 Chionaspis Lintneri Cooley, Can. Ent., Vol. XXX., p. 89 (1898). 



SCALE OF FEMALE. Plate 3, Fig. 3. Length, 2.5 3.2 mm. 

 Decidedly broadened posteriorly, somewhat flattened, usually thin 

 and flexible ; dull dirty white or snow-white in color. Exuviae 

 i mm. long, yellowish-brown. In many of the specimens examined 

 the small anterior exuvia had been brushed off and lost ; scarcely a 

 specimen among the cotypes of the species which I have seen has 

 this exuvia present. The second exuvia is .8 mm. long. 



FEMALE. Plate 7, Fig. 9. Median lobes obscurely pointed and 

 faintly serrate. Second and third pairs with the inner lobule larger 

 than the outer ; faintly serrate. The gland-spines are long and slen- 

 der and are arranged as follows : i, 1-2, 2, 1-3, 6-9. Second 

 row of dorsal gland-orifices represented by the anterior group consist- 

 ing of 3 6 orifices. Third row with 4 6 orifices in the anterior 

 and 5 7 in the posterior group. Fourth row with 6 8 orifices in 

 the anterior and 8 10 in the posterior group. Median group of 

 circumgenital gland-orifices, n 19; anterior laterals, 25 42; pos- 

 terior laterals, 19 28. 



SCALE OF MALE. Plate 3, Fig. 3 A. Length, .8 i mm. Par- 

 allel-sided, distinctly tri-carinate. Exuvia yellow or almost colorless, 

 occupying about two-fifths of the length of the scale. 



