A. albopunctatus, now regarded as a variety of perniciosus and A. 
andromelas (fig. 4), both Japanese, do not differ from perniciosus by any 
marked structural characters j andromelas is easily recognized by its scale. 
A. obscurus, which Mr. G. McCarthy reports as occurring rarely on 
peach in North Carolina (N.C Exp. Sta., Bull. 138), belougs to a differ- 
ent section of the genus from the above, and is distinguished at once 
by the dark gray scale, with exuviae appearing pitch-black when rubbed. 
There are five groups of ventral glands, the median of as many as six. 
The figure of A. crawii (fig. 4) illustrates the group of rapax, concexus, 
cydonicB, etc. (subg. Hemiberlesia Ckll.), iu which tbe median lobes are 
large but the others practically obsolete, or at best very minute. The 
plates are branched and crowded up toward the median lobes, making 
quite a dense fringe. 
The following table of the grouped ventral glands may be found 
useful : 
"•*■■■■ ffiat: 
A.perniciosus . 
A. andromelas. 
A. 
rapax . 
A.juglang-regice 
A.forberi 
A.ostreceformis (from England) .. 
A . convexus 
.1 . ancylus 
A . cydonice 
A . era wit 
A. uvce (on grapevine) 
A. ob. eurus 
A . howardi 
A.patavinus (on cherry in Italy) 
None. 
None. 
None. 
None. 
Caudo- 
laterals. 
None. 
None. 
to 4 
7 to 16 
1 to 3 
3 to 7 
6 
11 
None. 
7 
to 6 
6 to 14 
None. 
8 to 9 
None. 
5 
to 2 
4 to 9 
6 
12 
None. 
6 to 7 
to 2 
4 to 9 
None. 
None. 
None. 
4 to 8 
3 to 5 
3 to 
THE SUBGENERA AND SECTIONS OF ASPIDIOTUS. 
Professor Comstock, in his second Cornell report (1883), gave a table 
of the American species of Aspidiotus known at that time. It ran 
somewhat as follows: 
A. Last segment of female with six groups of ventral glands. This includes A. 
sabalis, which is now placed in the genus Comstockiella, 
AA. Last segment of female with less than six groups of ventral glands. 
B. Last segment of female with three pairs of well-developed lobes, and with 
elongated thickenings of the body wall terminating at or near the bases of 
the lobes. This is the subgenus Chrysomphalus Ashmead (type A. ficus), with 
the related groups Jfelcuiaspis n. subg. (type A. obscurus), Uycetaspis n. subg. 
(typo A. personal us), and Aonidiella Berl. & Leon, (type A. aurantii). 
BB. Second and third pairs of lobes smaller or wanting; caudal margin with two 
pairs of incisions, with thickened edges. This includes the subg. Diasjridio- 
tus Berl. &, Leon., with the related group Hemiberlesia (type A. rapax). 
BBB. With neither elongated thickenings of the body wall nor incisions with thick- 
ened edges. This includes subg. Aspidiotus s. str. (type J. nerii) ; Comstock 
also placedhere A. parlatorioides, which belongs to Pscudoparlatoria. A figure 
is given of a Mexican specimen of this, showing some of the details more 
precisely than that of Comstock. It will be seen that it differs widely from 
any Aspidiotus in the characters of the female as well as those of the scale. 
Another species of this genus, 7\ ostreata, is very destructive to Acahjpha in 
Jamaica. 
