TRICHOBARIS. 415 
with modified scales. In the single specimen from Cuernavaca the vestiture of the 
upper surface is dark brown, except at the sides of the prothorax, where it is white, 
and one (@ ) from Guanajuato wants the bare space on the propleura. 
2. Trichobaris mucorea. 
Baridius mucoreus, Lec. Proc. Acad. Phil. 1858, p. 79'; 1868, p. 364’. 
Trichobaris trinotata, var. mucorea, Lec. Proc. Am. Phil. Soe. xv. p. 288°. 
Trichobaris mucorea, Casey, Ann. N. York Acad. Sci. xv. pp. 562, 564°. 
Hab. Norvn America, Southern California and Arizona*, Texas; Lower 
Catirornia 4.—Mexico, Mexican boundary (Morrison), Ventanas (Morrer), San Blas 
(U.S. Nat. Mus.), Durango city ([/ége). | 
Specimens of this species (¢ 2 ) from San Blas and other localities in N.W. Mexico 
agree perfectly with those before me from California and Texas. ‘The vestiture of the 
ventral depression of the male, as stated by Casey, is uniform with that of the rest of 
the under surface, and the median space on the segments 3 and 4 is almost entirely 
bare. The San Blas examples are labelled as having been found on_ tobacco. 
T. mucorea is known in the United States under the name of the ‘“ Tobacco-stalk 
weevil,” and it is also said to attack Solanum carolinense and Datura stramonium and 
D. tatula (cf. Bridwell, U.S. Dep. Agric., Div. Ent., Bull. no. 44, pp. 44-46 (1904) |. 
8. Trichobaris compacta. 
Trichobaris compacta, Casey, Ann. N. York Acad. Sci. vi. pp. 568, 566". 
Hab. Nortu America, Southern California and Arizona!, New Mexico.— Mexico, 
Mexican boundary (Morrison), Pinos Altos in Chihuahua (Buchan-Hepburn), ‘Tres 
Marias Is., Presidio, Ventanas (forrer), Durango city (Hdége). 
Specimens from Durango differ from those from the other Mexican localities, as well 
as from the examples before me from California and Arizona, in having small partly 
denuded spots on the flanks of the prothorax and the vestiture of the upper surface 
brownish-ochreous or brownish-cinereous. 7. compacta is less elongate and more 
convex than 7. mucorea, the vestiture is a little coarser, and the ventral depression 
of the male is deeper, and more sparsely and not so coarsely squamose. Cockerell 
has found it upon Datura meteloides in New Mexico and Bridwell records it as breeding 
in the seed-pods of the jimson (Datura). 
4. Trichobaris soror, sp.n. (Tab. XX. figg. 23, 23a, 9.) 
Baridius vestitus, Boh. in Schénh. Gen. Cure. viii. 1, p.171 (¢, nec ¢)°. 
Oblong, flattened above, black, rather dull; thickly clothed with narrow cinereous or pale brown scales, 
which are transversely arranged on the prothorax and obliquely so on the elytral interstices, the 
yestiture of the under surface and legs coarser, denser, and wholly white, that of the antennal club in 
great part brown, the prothorax with a small spot on each side at the base, the scutellum, and sometimes 
a spot on each shoulder, almost bare, the ventral segments 3 and 4 with a narrow bare transverse space 
