29 
Ccecilius mobilis Hagen. — A single specimen agreeing perfectly with 
the brief but imperfect description of Dr. Hagen was taken on the under 
surface of a cotton leaf August 5. 
A second species belonging to another genus is apparently unde- 
scribed, and for this I have proposed the name Psocus gossypii. It is 
characterized as follows: 
Psocus gossypii u. sp. 
Female— Length to tip of wings, 6 mm ; expanse of wings, 10.5 n,n \ Rust-brown; 
ocelli, palpi, and antenn* except two basal joints, black; abdomen, except toward 
base above, blackish- fuscous; apical margin of the scutellum and legs (except the 
tibiie and tarsi, which are fuscous or blackish), yellowish; wings, fuliginous, 
the large triangular pterostigma and the venation (except of the median nervure and 
its fork, the claval veins batsally, the short vein along the hind margin just beyond 
the apex of the clavus, and the vein joining the hind fork of the median nervure and 
forming the posterior side of the closed quadrate discoidal cell, wliich are yellow- 
ish,) black. 
This species belongs in the section with P. venosus Barm, and super- 
ficially resembles it; but it is relatively smaller (although specimens of 
P. venosus are occasionally found as small), the color is paler without 
the brassy tinge on the head, while the pterostigma is black, not yellow. 
(To be continued.) 
ON A LECANIUM INFESTING BLACKBERRY, CONSIDERED IDEN- 
TICAL WITH L. FITCHII, SIGN. 
By T. D. A. Cockkkell. Las Cruces, N. Mex. 
In the year 1801 (or 1804 !) Schrank described a scale found on Hubus 
in Europe, naming it Coccus rubi. Signoret, when writing his " Essai,'' 
recognized that this was a Leeanium, but beyond this he could say 
nothing very definite, as Schrank's description was extremely short, 
and the insect had not been seen by him. 
Lichtenstein, however, in 1882, proposed a new genus Tetrura, its 
type being T. rubi. which he supposed to be the Coccus rubi Schrank. 
But his insect was a form allied to Dactylopius and therefore not that 
of Schrank. which still remained unknown to modern authors. 
Fortunately, in May, 1891, Dr. T. A. Chapman rediscovered Leeanium 
rubi (Schr.J in England, and in June of the same year the species was 
also found by Mr. J. W. Douglas. The latter gave an extended descrip- 
tion of it, with figures by Mr. Xewstead. in the Entomologist's Monthly 
Magazine (1892, pp. 105-107). 
Coming now to this country, we find in Signoret's work a description 
bf Leeanium fitchii, which was found on bramble by Asa Fitch. The 
latter had labeled it L. rubi, but Signoret observed that it did not seem 
to be the same as that of Schrank, and accordingly proposed the name 
L. titcltii. 
3613— No. 1 3 
