176 RHYNCHOPHORA. 
2. Isodacrys orizaba, sp. n. (Tab. VII. fig. 15.) 
Piceus, dense griseo-squamosus, subvariegatus, breviter parceque albido-squamosus. 
Long. 33 millim. 
Hab. Mexico (Truquz), Orizaba (Sallé, HT. H. Smith). 
This species is apparently closely allied to L. guatemalenus, but the erect sete are 
replaced by short white scales. In addition to this, there is a considerable difference 
in form, the thorax in J. orizabe being more slender, and the elytra become abruptly 
broader near the base and are acuminate behind. Nine specimens. 
3. Isodacrys mexicanus, sp. n. (Tab. VII. fig. 16.) 
Angustus, dense griseo-squamosus, prothorace elongato; elytris angustis, sutura posterius compresso- 
subelevata. 
331 willi 
Long. 22-3} millim. 
Hab. Mexico, Guanajuato (Sad/é). 
Antenne red, more obscure towards the apex. Rostrum rather broad; eyes widely 
separated. Thorax very long, rather broad, slightly inflated in the middle, covered 
with an indumentum, looking like scales, and definitely punctate. Elytra very convex 
transversely but not longitudinally, scarcely broader behind the shoulders, at which 
point they are just a little wider than the base of the thorax, with the suture on the 
declivous part a little compressed and prominent; covered with a griseous scale-like 
indumentum, which is slightly variegate; and with an obsolete striation. Five 
specimens. 
This interesting little insect need not be confounded with J. guatemalenus or 
7. orizabe on account of the apparent absence of sete; the set are, however, really 
present, but are so minute and short that careful observation is required to detect 
them. The three species, nevertheless, have a common peculiarity, inasmuch as 
there are one or two fine bristles on each side of the anterior margin of the thorax 
in such a position as to make it proper to call them rudimentary vibrisse. 
4, Isodacrys minutus, sp.n. (Tab. VII. fig. 17.) 
Ferrugineus, dense squamosus, setis brevissimis vestitus ; prothorace sat elongato. 
Long. 22 millim. 
Hab. Mexico, Omilteme (H. H. Smith). 
Antenne short, the joints of the funiculus, after the second, extremely small and 
difficult to count, the club large. Rostrum very short, only moderately broad; eyes 
slightly convex. Thorax slender, as long as broad, subcylindric, a little dilated in the 
middle. Elytra rather narrow, a good deal rounded at the sides and shoulders, very 
slightly convex longitudinally ; densely clothed with scales, and bearing minute sete, 
which are only conspicuous towards the apex, where they are a little longer ; finely 
striate. Legs stout. Four examples. 
This tiny weevil has the pronotum rather less elongate than its congeners, thus 
