50 PROCEEDINGS OF THE ACADEMY OF [Feb., 



less strongly and more closely punctured than in rufimaculus, the 

 punctures roimder ; occiput not so much depressed ; vertical brush 

 present, but no tubercles near ocelli; eye-emargination narrower 

 and less triangular ; clypeus similar in shape, but shallowly punc- 

 tured, the apical emargination larger and more triangular; 

 thorax practically as described in rufimaciilvs, perhaps less coarsely 

 sculptured and the concavity of middle segment less distinctly mar- 

 gined laterally ; abdomen very similar, as are also the wings. 

 Length 7^ mm. 



Chapada (April). Two specimens. Bears a strong resemblance 

 to mfimaculus, but is at once separated by the orange, not red, 

 color of head and pronotum. It is closely related to that species, 

 but the absence of ocellar tubercles, more deeply emargiuate and 

 less strongly sculptured clypeus, as well as coloration, readily sep- 

 arate it. 

 Odynerus (Ancistrocerus) rufimaculus n. sp. 



?. — Black, head (except between ocelli) and pronotum rufous; 

 antennae rufous, the flagellum dark above medially ; clypeus except 

 medially, mandibles except tips, posterior margin and antero-lateral 

 angfes of pronotum, tegidse except the brown middle, spot on meso- 

 pleuree above, scutellum, postscutellum, postero-lateral angles of 

 middle segment, apical margin of first dorsal, and apical margins 

 of second, yellow ; legs black, or black-brown, the anterior tibiae in 

 greater part and a stripe on the other tibiae, yellow. Head strongly 

 punctured ; occiput transversely depressed ; ocelli sunken, the hind 

 pair margined internally by a smooth tubercle, and behind them a 

 bunch of erect pale broAvuish hairs ; clypeus cordate, longitudinally 

 rugoso-punctate, but not coarsely so, the apex with two small ap- 

 proximate teeth, or, in other words, finely emarginate ; eye-emar- 

 gination quite triangidar ; thorax deeply punctured, especially the 

 dorsidum ; pronotum sharply margined, acutely angular or subden- 

 tate laterally ; postscutellum distinctly crenulated, truncate, with a 

 distinct vertical surface coalescing with the concave surface of mid- 

 dle segment, W'hich surface is smooth, carinate down middle and 

 bordered outwardly by a rough, tolerably distinct margin formed by 

 its junction with the sides ; the latter are strongly punctured except 

 basally ; abdomen robust ; carina of first segment sharp, that portion 

 of segment lying behind it much broader than long, the punctures 

 distinct but not coarse, and sparser basally; second dorsal more 



