422 RHYNCHOPHORA. 
ONYCHOBARIS, 
Onychobaris, Leconte, Proc. Am. Phil. Soc. xv. p. 294 (1876) (part.) ; Casey, Ann. N. York Acad. 
Sci. vi. pp. 466, 521. 
Twenty-two species * are referred to Onychobaris by Casey, who states that the focal- 
centre of the genus is in the dry regions of Arizona and New Mexico. Of the four 
southern forms included in it by Solari, O. dentibia and O. armipes are here placed 
under Solaria (antea, p. 390), and O. nicaraguensis (which is nearly related to the 
N.-American 0. ambigua, Casey) and O. punctatissima differ from all the described species 
in having at least the anterior femora dentate, a character also shared by O. senecta. 
The principal characters of Onychobaris are the more or less widely separated anterior 
coxe, the very deeply sinuate base of the prothorax, the feeble prosternal depression, 
the short, transverse scutellum, and the moderately long, stout, arcuate rostrum. One 
at least of the N.-American representatives, 0. mystica, Casey, lives on cactus. 
1. Onychobaris punctatissima, (Tab. XXI. fige. 2, 2a, 3.) 
Onychobaris punctatissima, Solari, Ann. Mus. Genova, xlii. p. 420 (1906) *. 
Hab. Mexico (Mus. Brit.; Flohr), “Sierra de Durango ”! (Hége, in coll. Solari), 
Acapulco (Hége). 
I have seen seven specimens of this insect, including the type. It has all the 
femora dentate, the prothorax coarsely, closely punctate, except along the polished 
median line, and the elytral interstices coarsely seriate-punctate. The first ventral 
segment is sulcate in the male. Length 3-4, breadth 14-24, millim. 
2. Onychobaris nicaraguensis. 
Onychobaris nicaraguensis, Solari, Ann. Mus. Genova, xlii. p. 421 (1906) *. 
Hab. Mexico, Ventanas in Durango (Ldge), Puente de Ixtla (Wickham), Temax in 
N. Yucatan (Gaumer); Nicaragua, Managua (Solari !). 
Sent us in numbers from Yucatan. Very like O. amdigua, Casey, from Arizona, 
but with the elytral vestiture darker, finer, and less bristly. The unarmed intermediate 
and posterior femora and the absence of the smooth median line on the prothorax 
separate 0. nicaraguensis from O. punctatissima. The first ventral segment is hollowed 
down the middle in the male. 
3. Onychobaris senecta, sp. n. 
Oblong, shining, varying in colour from seneous to black; somewhat thickly clothed with decumbent, pallid, 
hair-like scales. Head closely punctate, smoother and transversely depressed between the eyes; rostrum 
moderately stout, arcuate, about as long as the head and prothorax, closely punctate, in the @ a little 
longer and more slender, the antenne inserted at (¢) or behind (@) the middle. Prothorax much 
* Five only of these are known to me. 
