110 RHYNCHOPHORA. 
being very rugose in some examples; the elytral interstices are rugulose in most of 
them. The submarginal vitta is placed in a rather broad groove. The rostrum is 
stout, but varies much in length and thickness ‘in both sexes. The humeri are 
prominent, projecting a little beyond the hind angles of the prothorax. The larger 
males have a deep sulcus extending down the first two ventral segments, but this is— 
not always present. The single example received from Xucumanatlan, a male, 
apparently belonging here, has the rostrum very short, rugose, and carinate, and the 
elytra comparatively short and not at all produced at the apex. Length 10-20, 
breadth 22-64 millim. 
18. Lixus limbatus. (Tab. VII. figg. 10, 104, ¢.) 
Lizus limbatus, Boh. in Schénh. Gen. Cure. vii. 1, p. 427°. 
Hab. Mexico (Sallé, ex coll. Sturm!; Mus. Brit.), Sierra de Durango (fohr). 
There are two specimens (¢ 9) of this species in the Sallé collection, and we have 
recently received a female of it from Durango, the latter (as in one of those in the 
British Museum) having a line of whitish pubescence on the second elytral interstice 
(which is slightly depressed), in addition to the submarginal vitta. LL. limbatus is a 
very close ally of LZ. meaicanus, from which it differs in its smoother rostrum and 
elytra, the sulcus on the disc of the prothorax extending forward to the apex, and the 
third elytral interstice wider than the others. ‘he rostrum is also a little less curved, 
and it is slightly longer in the female than in the male. The apices of the elytra are 
shortly and obtusely produced. Length 16-17 millim. The Durango specimen is 
figured. 
19. Lixus basilaris, (Tab. VII. figg.11, lla, 3; 12, 124, @, var.) 
Lizus basilaris, Boh. in Schénh. Gen. Cure. vii. 1, p. 425°. 
Var. The submarginal vitta of the elytra reduced to a scattered series of piligerous depressions. (Fig. 12.) 
Hab. Muxtco, Sierra de Durango (Flohr), Toxpam, Yolotepec (Saddé), Almolonga, 
Jalapa (Hége), Xucumanatlan, Omilteme, and Chilpancingo in Guerrero (H. H. Smith) ; 
GuatemaLa, Duefias (Champion), Tecpan (Conrad). 
Not rare in Mexico. This species is nearly related to L. mexicanus, from which it 
may be distinguished by its narrower, more or less bowed shape (viewed in profile), the 
very shining, smoother upper and under surfaces, the more slender rostrum (especially 
noticeable in the females), and the strongly caudate elytra; the last-mentioned 
character, however, is inconstant, the larger specimens having the apices no more 
produced than in typical L. mexicanus. The submarginal vitta of the prothorax and 
elytra is placed in a shallow groove, that of the elytra being often reduced to a series 
of scattered depressions, each bearing a cluster of white hairs. The second joint of 
