OCR Text |
Show 1902.] OF AMERICAN COLEOPTERA. 185 thorax twice as broad as long, the sides feebly rounded near the base, very slightly narrowed anteriorly, the anterior angles oblique, the basal sulcus deep and rather sinuate, the anterior portion of the thorax impressed with a transverse fovea at the sides, the surface impunctate ; elytra widened towards the middle, feebly transversely depressed below the base, impunctate, their epipleurae very broad and concave. Hab. Bahia. Amongst the unicolorous species, the present Lactica is distinguished by the raised intra-ocular space in shape of two blunt elevations, and by the antemedian fovea of the thorax. LACTICA BAHIAENSIS, sp. n. Narrowly oblong, entirely testaceous; thorax impunctate, the basal sulcus deep and very sinuate; elytra not perceptibly punctured. Length 4 millim. Head with a deeply punctured sulcus round the eyes, the latter large, feebly emarginate, frontal elevations only indicated ; clypeus strongly convex between the antennae; the latter extending below the middle of the elytra, entirely testaceous, the second joint one-half shorter than the third, the fourth longer than the preceding joint; thorax about twice broader than long, the sides straight, the anterior angles oblique, the basal sulcus deep and strongly bisinuate, the disc impunctate; elytra not perceptibly punctured. Hab. Bahia. I must separate this species from its unicolorous allies on account of the more than usually sinuate thoracic sulcus, in connection with the structure of the head. LACTINA Harold. LACTINA LiEVICOLLIS, sp. n. Dark blue, the thorax nearly subquadrate, entirely impunctate ; elytra extremely closely and subrugosely punctured, clothed with very short grey pubescence. Length 6-7 millim. Male. Head impunctate, the frontal elevations strongly raised, elongate and oblique, carina acute, labrum black; antennae nearly extending to the apex of the elytra, dark blue, the third and fourth joints equal; thorax about one-half broader than long, the sides nearly straight, the anterior angles slightly produced outwards, the base with the usual deep, sinuate transverse sulcus, the surface entirely impunctate; elytra widened near the apex, extremely closely and rather finely punctured, the interstices very finely wrinkled and clothed with very short greyish hairs; epipleurae broad, concave and glabrous; the male organ curved and like that of L. glabrata, but with the anterior cavity shorter and more ovate, the sides raised and with a blunt ridge within. Hab. Peru. PROC ZOOL. Soc-1902, VOL. I. No. XIII. 13 |