THE CANADIAN ENTOMOLOGIST. 89 



NOTES ON DIABROnCA AND DESCRIPTIONS OF NEW 



SPECIES. 



BY FRED. C. BOWDITCH, BROOKLINE, MASS. 

 (Continued from page 58.) 

 D. mapiriensis^ ii. sp. 



Head and antennos black ; thorax olivaceous, tinged in front with 

 piceous, shiny, bifoveate, scutel black; elytra castaneous green, thickly and 

 coarsely punctate, rather opaque, strongly plicate, and with one or more 

 longitudinal sulcations on the disk, three black spots at the base, one 

 common sutural, the other humeral, all quadrate, the suture narrowly 

 piceous until near the apex, also a round spot on the convexity, about 

 equidistant between the margin and the suture; below prasinous, with black 

 pectus ; tibiae and tarsi black or piceous. Length, 3 mm. 



Ten examples, Mapiri, Bolivia. 



Antennae nearly as long as body in (^ , joints 2-^ short, equal, 4 

 longer than both preceding together, the basal joints a litde tinged with 

 piceous, thorax widest in front of the middle, and longer than broad, foveae 

 deep and well marked, the surface sparsely punctate ; elytral punctures 

 confluent in spots, and with the longitudinal sulcations showing in places 

 almost as costse ; the sutural black lining has a tendency to increase in 

 thickness between the apical spots. The m )st salient point for quickly 

 recognizing this form is its small size, dull greenish colour, with two 

 black spots behind, these being much more prominent casually than the 

 front marks, 



D. suri?ianiensis, nov. sp. 



Head piceous, with anterior face pale, antennse pale fuscous, last 

 three joints flavous, thorax pale flavous, smooth, convex, shining, impunc- 

 tate, scutel . black, elytra pale flavous, not placate, shining, with three 

 basal vittae, one sutural common, the other humeral, connected at the base, 

 and an apical lunule on the convexity, concave behind, all black, below 

 and legs pale flavous, with piceous pectus, tibiae and tarsi dark yellow. 

 Length, 6 mm. 



One example, Surinam (orange label). 



The clypeal ridge in front is almost wanting, the mouth tinged with 

 piceous, the antennas three-fourths as long as body, joint 2 short, 3 a trifle 

 longer, 4 one-half longer than the two preceding, thorax broader than long, 

 moderately sinuate behind ; the basal vittae reach the beginning of the 

 median third of the elytra, are broad, and the humeral obliquely truncate, 



March, 1911 



