74 Coleopterological Notices, III. 



moderate in length, the outer contour almost evenly arcuate, the 

 apex finely and acutely produced beyond the pectinate portion, the 

 latter extending nearly to the base, the denticles fine, long and spini- 

 form, gradually becoming very short toward base, eight or nine in 

 number. 



The single tropical species which extends within our faunal limits 

 may be described as follows •} — 



X. californicus Horn. — Trans. Am. Eut. Soc, 18G7, p. 138 (Prostenus) ; 

 fulgidus Makl. : Act. Soc. Fenn., X, p. 680. — Oblong-oval, evenly, moderately 

 convex, polished throughout, the upper surface metallic red, the under black 

 with steel-blue reflection ; legs and antennae black throughout ; integuments 

 devoid of fine pubescence, the upper surface bristling with long erect setae 

 from the coarse punctures. Head coarsely, very sparsely punctured, the eyes 

 small ; antennae one-half as long as the body, very stout, compressed, feebly 

 attenuate through the last three joints, the ninth joint as wide as long, third 

 distinctly longer than the fourth. Prothorax transversely oval, but little more 

 than one-third wider than long, the sides feebly angulate at basal third ; disk 

 without trace of impression or basal foveae, extremely coarsely, sparsely and 

 unevenly punctate, the large circular punctures intermingled with smaller 

 ones. Elytra between three and four times as long as the prothorax, and, in 

 the middle, about two-fifths wider, acutely parabolic at apex, the sides feebly 

 arcuate, the humeri rather narrowly rounded and broadly exposed, the disk 

 with unimpressed series of rather coarse close-set punctures ; the intervals 

 each with a single series of widely distant punctures, which are very much 

 larger than those of the striae. Abdomen finely, sparsely punctured. Legs 

 short, slender, the tarsi somewhat compressed, short, the basal joint of the 

 posterior but slightly longer than the next two combined. Length 9.3 mm. ; 

 width 3.5 mm. 



California; Mexico; Panama; Colombia. 



The representative from Panama, sent me by Mr. Champion, is 

 precisely similar in every detail to the single specimen of Frostenus 

 californicus in the LeConte cabinet at the Cambridge Museum. 

 This indicates a distribution which certainly could not have been 

 anticipated from analogy, at least in the present family. 



LYSTRONICHUS Latr. 



A comparatively composite genus in its present scope, essentially 

 tropical in distribution, but extending to the extreme southern 

 limits of the United States. 



' In stating the degree of separation of the eyes in terms of their own width 

 in the descriptions which follow, the point of sight is assumed to be in a per- 

 pendicular to the middle point of the interocular surface. 



