OCR Text |
Show 1880.] MR. M. JACOBY O N PHYTOPHAGOUS COLEOPTERA. 589 groove is situated at the middle near the base; anterior angles the thorax rounded; surface shining black, with two short rows of small punctures; scutellum black. Elytra much wider than the thorax, deeply punctate-striate, more finely punctured near the apex, the interstices at the latter place semicostate, impunctate, flavous ; a broad pear-shaped metallic blue patch, common to both elytra, occupies nearly the entire disk, commencing from the scutellum and ending at about two thirds of the length of the elytra, without, however, touching the lateral margins, the posterior margin of this patch is nearly truncate, the hinder angles oblique. Underside and legs black, base of the femora and lower part of the abdomen flavous. This species bears some resemblance to L. degandei, Baly, also from Ecuador; but in that insect the second and third joints of the antennse are of equal length, which is not the case in the present species, the third joint being double the length of the second ; the interspaces of the elytra are not elevated, and the strife are regular; the blue colour in L. degandei extends also through the entire length of the elytra. It might perhaps best be placed after L. bipartita, Lac. Mus. Jacoby. 3. LEMA FLAVICORNIS, sp. nov. Oblong, fulvous; head, sides of the breast, and a spot on each femur black ; antennse flavous, the basal joint black. Length 3-J lines. Extreme base of the head fulvous, the rest black, shining, impunctate, finely transversely grooved behind the eyes, orbital grooves very deep ; antennse one third the length of the body, rather robust, flavous, the first joint subglobular, black. Thorax subquadrate, anterior angles rounded, basilar transverse groove distinct, sides deeply constricted below the middle; surface fulvous, with two parallel rows of fine punctures from the apex to the middle. Elvtra convex, strongly punctate-striate near the base, the punctures becoming very fine towards tbe apex ; interstices smooth, not costate, minutely punctured towards the base. Sides of the breast and a mark in the shape of a ring at the middle of the femora black ; rest of the underside and the legs fulvous ; claws piceous. Mus. Jacoby. Genus MASTOSTETHUS, Lacord. 4. MASTOSTETHUS BUCKLEYI, Baly, Cistula Entomol. 1878. Mus. Godman and Salvin. 5. MASTOSTETHUS THORACICUS, Baly, Ann. Nat. Hist. 1859 p. 200. 6. MASTOSTETHUS MODESTUS, sp. nov. Broadly ovate, robust. Light fulvous ; head black, variegated with testaceous, sides and base of mesothorax black ; elytra fulvous, with |