120 RHYNCHOPHORA. 
Oblong-ovate, piceous or rufo-piceous, darker beneath ; the upper surface with scattered, piliform, appressed, 
whitish or ochreous scales, and with small patches of coarser, broader, similarly-coloured scales on the 
disc, sides, and base of the prothorax (the two small spots on the dise and one in front of the scutellum 
being the most distinct), on the scutellum, and at the apex of the elytra, and two oblique irregular fascie of 
coarse scales on the disc of each of the latter (the anterior one entirely ochreous, the other ochreous, becoming 
whitish towards the suture); the under surface thickly clothed with coarse, oval, whitish or ochreous 
scales, the legs with piliform scales. Head and rostrum rugosely punctured, the antenne inserted at the 
middle of the latter in the ¢, and ata little behind the middle in the 9. Prothorax slightly broader 
than long, abruptly constricted and much narrowed in front, the sides feebly sinuate before the base, the 
hind angles acute and directed outwards ; the surface densely, coarsely punctate, the narrow interspaces 
subgranulate, the disc with an abbreviated median carina. Elytra flattened on the disc, coarsely 
punctate-striate, the interstices rugulose and rather coarsely granulate, the alternate ones more or less 
costate. Beneath coarsely, closely punctate, the first ventral segment in the g depressed along the 
middle and more sparsely punctured. 
Length 73 millim. (¢ 2.) 
Hab. Norta America!?35, Lake Superior to Georgia*.— Mexico, Omilteme in 
Guerrero (H. H. Smith). 
The female scarcely differs from others before me from Boston, U.S.A., but the 
male has a more coarsely sculptured prothorax and coarsely granulate elytra. 
Group LISTRODERINA. 
The affinities of this group, as shown by the Australian genus Desiantha, Pasc., seem 
to me to be with the Erirrhina (Hydronomides), and not with the Hyperina, amongst 
which it is placed by all North-American writers. 
LISTRONOTUS. 
Listronotus, Jekel, Ann. Soc. Ent. Fr. 1864, p. 566; Leconte, Proc. Am. Phil. Soc. xv. p. 127. 
The North-American species referred to Listroderes by Gyllenhal were separated by 
Jekel from that genus under the name Listronotus, and this course has been followed 
by Leconte, the chief difference being the posteriorly evanescent scrobes in the South- 
American forms. 
In L. bagotformis and its allies the first and second ventral segments are connate at 
the middle, and the scrobes are deep throughout. 
1. Listronotus bagoiformis, sp.n. (Tab. VIII. figg. 1, 1a, ¢.) 
Elongate-ovate, narrow, somewhat depressed, black, the antennz and tarsi partly ferruginous ; thickly clothed 
with rather large rounded scales, which on the upper surface are mostly of a pale brown colour, variegated 
with whitish and fuscous, the darker mottling being most distinct on the dorsal portion of the elytra; the 
elytra with a row of scattered, fine, decumbent sete on each interstice, the rest of the surface and the legs 
also with scattered hairs. Head and rostrum closely, finely punctate; the rostrum stout, shorter than 
the prothorax, very faintly carinate towards the tip; the front shallowly foveate; second joint of the 
funiculus much longer than the first. Prothorax a little broader than long, slightly rounded at the sides, 
as well as at the base, about equally narrowed in front and behind, the surface densely, rugulosely 
punctate. Elytra moderately elongate, nearly onc-half wider than the prothorax, very gradually narrowing 
