1902.] OP AMERICAN COLEOPTERA. 187 



Hah. Colombia, Venezuela. 



I know of only one other described species which has an 

 impubescent upper surface {L. chalcoptera Har.) ; but in that 

 species the carina of the head is short and blunt, the thorax is 

 impunctate, the elytra have traces of costse and are cupreous in 

 colour. In the female of the present species the antennae are 

 much shorter and the elytra show a slight depression below the 

 base ; the insect is also much more robust in shape. 



DiSONYCHA DECEMMACULATA, Sp. n. 



Black ; thorax flavous, with four black spots ; elytra strongly 

 punctured, black, each with five flavous spots (2, 2, 1), the one 

 near the scutellum curved ; the femora and the abdomen flavous. 



Length 4 millim. 



Head with a deep punctured groove near the eyes, black, with 

 a flavous mark on the vertex, the frontal elevations distinct, the 

 clypeus strongly convex, flavous ; labrum black ; antennae robust, 

 black, the lower four joints flavous below, third joint slightly 

 shorter than the fourth ; thorax twice as broad as long, flavous, 

 the sides straight, the anterior angles scarcely oblique, rather 

 rounded, posterior angles oblique, the disc impunctate, with four 

 small black spots placed transversely ; elytra strongly and cloaely 

 punctm-ed, black, each with five yellow spots, one at the humeral 

 callus, another in shape of a 3 near the scuteUum, two round 

 spots at the middle and a transverse one near the apex ; the 

 breast, the tibiae and tarsi black ; femora and abdomen flavous, 

 the apex of the posterior femora black. 



Hah. Pernambuco, Pery-Pery. 



This species will be easily recognized by the strong elytral 

 punctuation and the outwardly curved spot near the scutellum. 



DiSONYCHA ELONGATA, Sp. n. 



Elongate and subdepressed, testaceous, the terminal joints of 

 the antennae fuscous ; thorax impunctate ; elytra not perceptibly 

 punctured ; a very narrow sutural and a sublateral stripe and a 

 broader longitudinal band at the disc, black. 



Length 9 millim. 



Head impunctate, the clypeus with an acutely raised central 

 ridge ; eyes reniform, rather deeply emarginate; antennae extend- 

 ing to the middle of the elytra, rather robust, fuscous, the lower 

 four joints testaceous, the fourth joint nearly twice as long as 

 the third ; thorax about one-half broader than long, the sides 

 nearly straight with a narrow margin, the posterior angles 

 strongly oblique, anterior angles obliquely truncate ; scutellum 

 black; elytra rather flattened, not perceptibly punctured, tes- 

 taceous, very shining, the suture very narrowly and a slightly 

 wider stripe close to the margins black, another much broader 

 band extends from the middle of the base nearly to the apex ; 

 below and the legs testaceous, the apex of the posterior tibiae 

 obscure fuscous. 



18* 



