4 | RHYNCHOPHORA. 
each of them being now before me, and these are female and male respectively ; the 
male is labelled with the locality “Tuspan.” In this insect the eyes are coarsely 
facetted and very narrowly separated above. ‘The elytraare irregularly and subequally 
tessellated with fuscous and ochreous scales; and the prothorax has a line of ochreous 
scales down the middle. ‘The male has the first ventral segment sulcate, and the fifth 
slightly depressed down the middle, there being a patch of dark brown scales on 
either side of this space at the apex. One of the types of J. chevrolati, from Tuspan, 
is figured. 
2. Isorrhinus depressus, sp. n. (Tab. I. figg. 8, ¢; 34, profile of head.) 
Oblong-ovate, depressed, piceous, the antenns and the tarsi in part ferruginous ; variegated above with rather 
coarse, piliform, fuscous and cinereous scales, and with scattered decumbent hairs, the prothorax with a 
median line of cinereous scales ; the squamosity of the under surface and legs in great part cinereous. 
Rostrum short and stout, closely punctate ; joints 1 and 2 of the funiculus equal in length; eyes large, 
somewhat coarsely facetted, almost contiguous above. Prothorax transverse, densely punctate, the sides 
parallel from the middle to the base. Elytra more than one-half wider than the prothorax, moderately 
long, flattened on the disc to about the middle, subparallel in their basal half, the humeri rounded; seriate- 
punctate, the interstices feebly convex, and closely, very minutely punctate. First ventral segment broadly 
and deeply, and the fifth shallowly, depressed down the middle, and the latter with a broad patch of blackish 
scales at the tip, in the ¢. 
Length 5-6, breadth 23-3 millim. (d 2.) 
Hab. Mexico, Cuernavaca in Morelos (/ége). 
Eleven specimens. Very like I. fuscomaculatus, but less convex, the elytra flattened 
on the disc anteriorly and with the sides straighter, the eyes larger and almost 
contiguous above. The dark scales predominate on the elytra. 
3. Isorrhinus confusus. (Tab. I. figg. 4, 9; 44, profile of head.) 
Phytonomus confusus, Boh. in Schénh. Gen. Cure. vi. 2, p. 350°. 
Tsorhinus confusus, Capiom. Ann. Soc. Ent. Fr. 1867, p. 446’. 
Hab. Mexico (coll. Chevrolat'), Oaxaca (Hoge). 
The type of this species, kindly lent by Dr. Aurivillius, is a male, and a female 
obtained by Herr Hége at Oaxaca agrees very well with it, except in its much larger 
size. Both have the elytra asymmetrically tessellated with patches of fuscous scales, 
the rest of their squamosity being ochraceous. ‘There is a line of ashy scales down the 
middle of the prothorax. ‘The eyes are rather finely facetted, and separated above by 
a space about equalling the length of the first joint of the funiculus. The first ventral 
segment is depressed down the middle in the male. Compared with J. depressus the 
present species is much smaller and less elongate, the eyes are less approximate above - 
and more finely facetted, and the elytra are more irregularly tessellated with fuscous, 
the light colour predominating. 
