THE CANADIAN ENTOMOLOGIST. 387 



antennre about three-fourths the length of the body, joints 3-4 about 

 equal, one-half longer lh?n the second, the 4 lower joints flavous tinged 

 with piceous, thorax elongate, shining, i^lightly sinuate behind, the side 

 fovea are much more marked than the median, the elytra have three 

 strongly marked longitudinal costae of which that in the third interval is 

 the widest and extends from just below the base nearly to the apex, the 

 other two are humeral and subhumeral, forming a deep plica, are almost 

 carinal in form, and vanish at the convexity, the subsulural flavous stripe 

 embraces the whole of the third interval costa, and a broad margin on 

 either side, the fine punctuation shows its striation best by being observed 

 at an angle in a strong light. The vicinity of the scutel is distinctly 

 depressed, some examples have indications of other elytral costae, but the 

 three above described are always the most prominent. Belongs to the 

 division of separata Baly. 



D. carinipennis^ nov. sp. 



Head black, mouth parts piceous, antenncC black, more or less 

 piceous at the base and with joints 9, 10, 11 flavous with extreme tip 

 black, joints 3 and 4 equal, each almost twice as long as the second, 

 thorax flavous, rufous yellow, broader than long, deeply excavate 

 bifoveate, subangulate at the sides, elytra shining black, punctate striate, 

 and tricostale the lateral margin, except the base and a subsutural stripe 

 flavous, body beneath flavous in front, black beliind, legs flavous, tibiae 

 and tarsi black. Length, 4-4^^ mm. 



Three examples, Bolivia, green label (Chaco }). 



Close to bivUtida Kirsch., but the thorax is comparatively wider 

 and more deeply foveate, the eighth joint of the antennae is black, the 

 elytra seem more depressed, so that the two side costae, which are 

 humeral and subhumeral, are very sharp and have the appearance of 

 carinas and foim a deep plica from just below the shoulder nearly to the 

 convexity ; the third interval covered by the subsutural yellow stripe is 

 strongly costate and thickened from just below the base nearly to the 

 tip, as in bivittiila and its allies, but the flavous colour is more diffuse, 

 especially at the middle half, in one example ( ^ ?) the lower part of the 

 face is flavous. 



D. graniiUpennis, nov. sp. 



Head shining black with a deep frontal fovea and a few gray hairs in 

 front of the eyes, antennae black, piceous at joints, joints 3 and 4 equal, 



