DIOPTROPHORUS.—ITHAURA. 95 
Prothorax much longer than broad, widest a little before the middle and obliquely narrowing thence to 
the base and apex, constricted in front, the apex emarginate; the disc somewhat flattened, irregularly 
carinate down the middle, and with a large, depressed, subtriangular space on either side towards the 
apex, the depression followed by two angular prominences, the rest of the surface with coarse scattered 
punctures and irregular ruge, the margins subtuberculate at the middle. Elytra oblong-ovate, much 
wider than the prothorax, but at the base of nearly the same width, considerably produced at the apex ; 
interruptedly seriate-punctate, the interstices with a scattered series of large, rounded, exceedingly 
prominent tubercles, these becoming more elongate towards the base and there forming ridges on the 
third and fifth. Legs stout. 
‘Length 9, breadth 4 millim. (?9.) 
Hab. Mexico, Sierra de Durango (Flohr). 
One specimen. Larger, more robust, and more elongate than any of the other 
known species of the genus, the elytra strongly nodose, the eye-facets flattened, instead 
of convex. In general facies D. verruciger is very like Anchonus nodosus. 
ITHAURA. 
Ithaura, Pascoe, Journ. Linn. Soc., Zool. ix. p. 215, t. 6. figg. 2-2 a-c (1871) ; Ann. & Mag. Nat. 
Hist. (5) vu. p. 808 (1681). 
Head globose, smooth; rostrum constricted at the base, stout, feebly curved, the apical portion a little 
widened, the scrobes deep, visible from above anteriorly, descending to beneath the eyes, and some- 
what widely separated behind; eyes rounded, coarsely facetted, placed at the sides of the rostrum 
behind: antenne inserted at about one-third from the apex of the rostrum, the funiculus 7-jointed, 
joints 1 and 2 subequal in length, the others transverse, the scape reaching to about the middle of the 
eyes, the club short-ovate and pubescent; buccal opening large, the oral organs visible; prosternum 
much developed in front of the anterior coxe, slightly hollowed at the apex, with a transverse sulcus 
near the anterior margin; pronotum extending backward over the mesonotum; anterior coxe very 
narrowly separated; mesosternum extending forward in front of the intermediate cox, which are 
narrowly separated; scutellum wanting; elytra connate, hollowed at the base, with the subangular 
humeri embracing the hind angles of the prothorax, covering the apex of the abdomen, and without 
membranous apical margin ; first and second ventral segments connate at the middle, the third and 
fourth short, the sutures 2 and 3 deep and straight ; femora stout; tibie mucronate at the inner apical 
angle, the anterior pair sharply so, and with a terminal claw arising from about the middle of the apical 
margin ; third tarsal joint a little widened, entire at the apex, the fourth joint articulated to it in a 
cavity on the upperside; claws slender, simple, divergent; body elongate-oval, apterous, coated with 
a hard permanent, glossy incrustation. 
This remarkable genus was referred by Pascoe somewhat doubtfully to the 
Calandrine, but it seems to me to be very closely related to Dioptrophorus, of 
the group Anchonina. The two species described by him were from Colombia 
and Parana respectively, and two others are now added from our region. Typhlo- 
glynma, Dury *, also referred to the Calandrine by its describer, including a single 
N.-American species, is a nearly allied form. The above-mentioned characters, taken 
from the Central-American insects, will supplement Pascoe’s description. 
In Ithaura there are well-developed eyes at the sides of the rostrum (as in 
Dioptrophorus and Theognete), the scrobes are somewhat distant beneath, the first 
* Journ. Cincinnati Soc. Nat. Hist. xix. pp. 243, 244, fig. (March 1901), 
