OF WASHINGTON. 149 



The concluding paper was by Mr. Kotinsky, and entitled : 

 THE FIRST NORTH AMERICAN LEAF-GALL DIASPINE. 

 By JACOB KOTINSKY. 



While out collecting in the woods of the District on October 12, 

 1902, 1 was attracted to an undersized tree, several leaves of which 

 were literally covered with small galls. The underside of these 

 leaves was dotted with white specks corresponding to the galls 

 above, and under a magnifying lens the former proved to be the 

 scales of a Diaspine. This brought to mind similar specimens sent 

 by Mr. W. M. Scott, of Atlanta, Ga., the preceding July to the 

 Department of Agriculture, which I had the privilege of examin 

 ing. Subsequent search and study revealed the following facts : 

 That the insects as well as the food-plant are identical with those 

 of Professor Scott ; that the latter is the common sweet-gum tree, 

 or bilsted {Liquidambar styraciflud}; that scarcely a tree was 

 inspected but was more or less infested with the insect, and that 

 the insect is referable to Cryptophyllaspis, Ckll. (Bull. 6, Tech. 

 Ser., Div. Ent., U. S. Dept. Agr., 1897, p. 14), and is a species 

 new to science. I therefore describe it herewith : 



Cryptophyllaspis liquidambaris, n. sp. 



9 gall. Mostly on upper side of leaf, .510 2 mm. high, bluntly conical. 



9 scale. Mostly on under side of leaf; waxy, central portion within 

 the gall cavity a little beneath the level of the leaf surface; exuvium pro 

 portionately large, lemon yellow, subovate, about .4 mm. in diameter, wax 

 rim about .2 mm. wide. 



9 Subcircular, about .3 mm. wide and .4 mm. long; anterior \ of 

 body, and the lobes smoky yellow and heavily chitinized; caudal end 

 transparent, no circumgenital glands; dorsal pores few; a group of three 

 in line with and cephalad of first incision, and three parallel to these 

 from a point cephalad of second incision ; anal orifice 90 ^ from base of 

 lobes, 45 ju. in diameter ; one pair of median lobes 12-13 M w ide at base and 

 5-7.5 ju. intervening space, notched on each side, lateral notches lower than 

 interior; two incisions each side of the lobes, the caudal larger, wall 

 thickenings subequal in all. The plates are shaped like those character 

 istic of Cktysomphalus spp., and are distributed as follows: two of the 

 ordinai-y type between the median lobes; two of the Chrysomphalus type 

 between each lobe and the first incision, and three between the first and 

 second incisions; then there are also several dagger-shaped, beyond the 

 second incision ; the spines are slightly longer than the lobes, and a pair is 

 to be found just cephalad of each lobe and incision. This description is 

 from several specimens mounted in Canada balsam. 



