104 RHYNCHOPHORA. 
baro, Cordova (Hége), Temax in N. Yucatan (Gawmer); GUATEMALA, Las Mercedes; 
Duefias (Champion). 
In the typical form of this insect the prothorax and elytra have a submarginal vitta 
of condensed whitish pubescence, a character also to be found in certain specimens of 
L. macer (as noted by Leconte); but this is frequently obsolete, and in our series of 
twenty-eight examples from Mexico or Guatemala four only possess this peculiarity. 
L. fimbriolatus may be identified by the dissimilarity in the length of the rostrum in 
the two sexes, it being about twice the length of the prothorax and strongly curved 
in the female, and shorter and moderately curved in the male. The first and second 
ventral segments are more or less sulcate down the middle in the male. The rostrum 
is slightly widened at the tip. We are indebted to Mr. Wickham for specimens of 
L. macer from Ulinois and Iowa, with which our smallest examples agree. In s1X 
out of the seven males from Duefias the pubescence is longer and more abundant 
than usual, but this is probably due to their fresh condition. Length varying from 
15-23 millim. 
4. Lixus inermis, sp. n. 
Elongate, cylindrical, shining, black, the antenne partly rufescent; finely cinereo-pubescent, the pubescence 
in some specimens condensed into a narrow more or less distinct submarginal vitta. Head and rostrum 
closely, minutely punctate, with intermixed coarser punctures, the head foveate between the eyes; 
rostrum moderately stout, in the ¢ about as long as the prothorax and moderately curved, in the 
9 slightly longer and strongly curved. Prothorax about as long as broad, subconical, strongly bisinuate 
at the base; densely, minutely punctate, with intermixed coarser punctures, the basal depression rounded 
and very deep. Elytra very little wider than the prothorax, subparallel for three-fourths of their length; 
more or less acuminate at the apex, the common basal depression broad and shallow ; seriate-punctate, 
the interstices flat and rugulosely punctate. First and second ventral segments shallowly sulcate down 
the middle in the g. Body winged. 
Length 103-15, breadth 3-4 millim. (d Q.) 
Hab. Mexico, Toxpam in Vera Cruz (Sallé). 
Seven specimens, three of which are immature. This species may be known from 
L. cavicollis by its narrower, cylindrical shape (the elytra being scarcely wider than 
the prothorax) and the more slender rostrum ; and from L. jimbriolatus by the shorter 
rostrum in both sexes, that of the female being very little Jonger than that of the male, 
as well as by its cylindrical form, smaller size, and less robust build. The unarmed 
anterior femora and the acuminate elytra separate L. inermis from L. dentipes, which 
is very like it in general facies; and the subparallel and less acuminate elytra from 
LL. subcaudatus. 
5, Lixus rugulirostris, sp. n. 
Very elongate, cylindrical, shining, black, the antenne partly rufescent; finely cinereo-pubescent, in one 
specimen with a well-defined submarginal white vitta. Head and rostrum densely, rugulosely punctate ; 
the latter smoother at the tip, about as long as the prothorax, comparatively slender, and feebly curved. 
