LIXUS. 107 
10. Lixus musculus. 
Lizus musculus, Say, Descr. Col. N. Am. p. 14 (July 1831) *; Complete Writings, i. p. 276°; Lec. 
Proc. Am. Phil. Soc. xv. p. 158°; Casey, Ann. N. York Acad. Sci. vi. pp. 196, 202 *. 
Lizus punctinasus, Lec. loc. cit. p. 157°. 
Moderately elongate, rather broad, subfusiform, shining, black, finely cinereo-pubescent, the pubescence 
concentrated into large patches on the elytra and a broad oblique marginal vitta on the prothorax. 
Head and rostrum closely, minutely punctate, with intermixed coarser punctures, the head shallowly 
foveate between the eyes ; rostrum stout, curved, in the ¢ shorter than the prothorax, in the 9 slightly 
longer and smoother ; eyes rather prominent. Prothorax broader than long, gradually narrowing from 
the base, the sides rounded anteriorly and constricted in front, the base strongly bisinuate, the basal 
impression deep and extending forward ; the surface densely, minutely punctate, with intermixed, coarse, 
rounded punctures. Elytra moderately long, wider than the prothorax, narrowing from the middle, the 
apices usually produced and subcaudate, the anterior margin raised, the common basal depression rather 
deep; seriate-punctate, the interstices flat and transversely rugulose. Beneath closely, finely punctate, 
with intermixed coarser punctures. First ventral segment faintly depressed in the middle in front in 
the ¢. Legs stout. Body winged. 
Length 8-10, breadth 23-33 millim. (¢ Q.) 
Hab. Norvn America, New Jersey to Texas and Colorado ®.—Mexico, Guanajuato, 
Cuernavaca (Sallé), Tepetlapa, Venta de Zopilote (H. H. Smith), Almolonga, Tapachula 
(Hoge), Temax in N. Yucatan (Gaumer); GuaTEmaLa, Coatepeque (Champion). 
Numerous examples, differing from others from Iowa sent me by Mr. Wickham in 
having the apices of the elytra subcaudate—a character, however, that is not constant. 
The species is distinguishable from Z. simplex by its shorter rostrum, more convex 
eyes, coarsely punctured prothorax, and subcaudate elytra; and from L. depressus by 
its less elongate form, &c. 
11. Lixus quadricollis, sp. n. 
Moderately elongate, narrow, subfusiform, shining, black, finely cinereo-pubescent, the pubescence somewhat 
mottled or lineate on the elytra and condensed into a narrow oblique submarginal vitta on the prothorax. 
Head and rostrum closely, minutely punctate, with intermixed coarser punctures; rostrum stout, curved, 
a little shorter than the prothorax in the 9, still shorter in the ¢. Prothorax subquadrate, slightly 
broader than long, strongly bisinuate at the base, the sides subparallel from the base to near the apex and 
then abruptly constricted, the basal impression shallow ; densely, minutely punctate, with intermixed 
coarse punctures. Elytra moderately long, not or very little wider than the prothorax, narrowing from 
about the middle, acuminately produced at the apex, the common basal depression transverse, shallow, 
the basal margin somewhat raised ; rather finely seriate-punctate ; the interstices flat and finely rugulose. 
Body winged. 
Length 7-9, breadth 2-25 millim. (¢ 2.) 
Hab. Mexico, Temax in N. Yucatan (Gawmer). 
Seven specimens. Narrower than L. musculus, the rostrum still shorter; the pro- 
thorax straighter at the sides, abruptly narrowed in front, and with a shallow basal 
depression; the pubescence not condensed in large patches on the elytra. The 
subquadrate prothorax and the less parallel elytra and sparser pubescence separate it 
from L. semivittatus. 
PP 2 
