37 
ouic larva pale pinkish ; hairs of anogenital ring relatively much larger 
than in the adult. 
Habitat — Giudad Porfirio Diaz, Ooahuila, Mexico, on Yucca (prob. 
Y. australis), November 25, 1894. (Townsend; Div. Ent. No. 6464.) 
At first I thought I would not describe this species, having only 
alcoholic material, but. its characters are so distinct that it will be eas- 
ily recognized. It is something like I), glaucus Maskell, and is one of 
those forms which are only placed in Dactylojrius because no better 
place can be found for them pending a revision of the dactylopiine 
genera, for which the time is perhaps hardly ripe. 
Eriococcus dubius n. sp. 
Female. — When dried, very dark reddish purple (boiled in caustic 
soda, does not stain liquid); length with sac a little over 3 mm.; sac 
loosely felted, white, with a slightly yellowish tinge; form as usual in 
genus. Derm colorless, with numerous stout spines. Legs and antennae 
pale brownish yellow. Antennae fairly slender, 7-jointed, 3 longest, 
and almost (sometimes quite) as long as 4 and 5, though sometimes 4 is 
nearly as long as 3; joint 4 longer than 5 and 6; 7 decidedly longer than 
5 or 6 ; 5 longer than 6 • formula 3, 4 (1, 2) 7, 5, 6, or 3, 4, 2 (1, 7) 5, 6. Legs 
moderately slender; coxa longer than tibia, but shorter than femur. 
Tibia and tarsus subequal; sometimes tibia, sometimes tarsus, a little 
the longer. Claw very large, not much curved. Digitules ordinary, 
slender but not filiform. Large bristles on inner side of tibia and 
tarsus. Hair on trochanter short, not half as long as femur. Posterior 
tubercles small, but cylindrical, as usual in genus. Anogenital ring 
with eight hairs. 
Embryonic larva elongate, x>ink, with prominent posterior tubercles 
emitting the usual long setae. Rows of spines down the back, as in 
larva of Coccus. Fifteen stout spines on each lateral margin, occupy- 
ing posterior two-thirds of margin. Legs and mouth-parts large. 
Antennae stout, 6-jointed, 3 longest, 4 and 5 shortest, 6 about as long 
as 4 and 5. 
Habitat. — Valles, State of San Luis Potosi, Mexico, on a shrub not 
identified, but with leaves small, lanceolate, pale apple green above, 
densely stellate-pubescent beneath. (Townsend, October 13, 1894 ; Div. 
Ent. Dept. Agr. No. 6441.) 
It is severely attacked by a species of Leucopis. 
This species proves to be extremely close to H. coccineus Ckll., which 
is no doubt really neotropical, though so far only known from a Ne- 
braska greenhouse. It would have made the differences between 
dubius and coccineus clearer if the former could have been described in 
its living state, but although I had a brief glance at dubius before Pro- 
fessor Townsend sent it to Washington it did not occur to me to make 
any descriptive notes at the time, since I had no idea that I should be 
the one to introduce the species into the literature. It has been 
