ae) 
formula 6, 3, 1, 4 (2, 5); 4 sometimes much more slender than 3. 
Anogenital ring with six distinct hairs.- Claw with very small digitules. 
Habitat.—San Ignacio, Sonora, Mexico, on “ gecota,” Hymenocloa 
monogyra. (Townsend, October 4, 1894; Div. Ent. Dept. Agr. No. 6448.) 
The affinities of this fine species are clearly with O. anne Ckll., which 
it much resembles. These forms are of the type of O. urtice Linn. as 
regards the formation of the laminz or lamellie of white secretion. 
The following form, closely allied to P. ywecw! Coq. (D. mevicanus 
CkIl.), has just been received from Antigua: 
Phenacoccus yucce, n. var barberi Ckll. 
Female.—In spirits looks like a Monophlebus, the cottony secretion 
having been lost; whitish, nude, shiny, segmentation distinet; length 
about 5, breadth about 24 mm.; legs and antenni pale reddish brown 
(very much paler than those of P. yucew), shiny. Anogenital ring with 
six stout bristles. Posterior lobes rounded, low, inconspicuous, with a 
few hairs and numerous short spines, after the manner of Dactylopius. 
Antenne 9-jointed, the joints subequal, very distinct, bearing whorls 
of hairs; 9 about one-third longer than 8; 7 a little longer than 8; 2, 
4, 5,6, and 7 practically equal, 2 perhaps slightly the shortest; 3 a little 
longer than 4; 1 about as long as 2; formula 9,3 (1, 2, 4,5,6,7) 8. Legs 
large, ordinary, tibia somewhat longer than femur; tibia and femur each 
with two rows of stiff bristles, tibial bristles about twelve in a row, 
femoral about seven. Trochanter with five bristles and one long hair. 
Tarsus extremely short; excluding claw, it is of the same length as 
last joint of antenna. Claw large, curved, with a small but very dis- 
tinct denticle on its inner side. Tarsal digitules filiform, with minute 
but distinct knobs; digitules of claw filiform. Sides of segments with 
round patches of small spines. 
Habitat.—Collected by Mr. C. A. Barber, in Antigua, on Allamanda 
and Thunbergia grandiflora, and also observed by him on Coleus and Cro- 
ton growing near the Thunbergia. Mr. Barber also sent me numerous 
specimens which he found on a plant not identified, at St. Kitts. 
Although the material sent was abundant, it was all in alcohol and 
included no males; hence I am unable to determine whether we have 
to do with a distinet species or not. The distinctions from yucca, so 
far as can be made out from the alcoholic material, are very slight, 
although barberi can be easily separated by the pale legs and antenne. 
These forms are not typical Phenacoceus (Pseudococcus Auctt.) by any 
means, and will doubtless have to be eventually placed in a distinct 
genus or subgenus. I hesitate to make such a change now, because the 
whole dactylopiine series stands in need of generic revision, and it will 
be better to let the matter rest until this work can be taken in hand. 
1T have received alcoholic specimens of this insect from Mr. Urich, collected in 
Trinidad. They show joint 3 of antenne rather longer than 9; otherwise they agree 
excellently with the barberi from Antigua. Mr. Urich writes that he found them in 
St. Anns, on orange trees, but they were not common. 
