1902.] OP 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 

 epipleurse very broad and concave. 



Hob. Bahia. 



Amongst the unicolorous species, the present Lactica is dis- 

 tinguished 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, 



JUab. 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 out- 

 wards, the base with the usual deep, sinuate transverse sulcus, the 

 svu-face 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 ; epi- 

 pleurse 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 



