384 PROCEEDINGS OF THE ACADEMY OF [1897. 



Trypoxylon fabricator Sm. 



Chapada (October). Three specimens. This species is probably 

 identical with T. gracile Tasch. 



Trypoxylon superbum Sm. 



Chapada (April). One specimen. 

 Trypoxylon lsevifrons Sm. 



One specimen. Chapada (October). 

 Trypoxylon laeve n. sp. 



9- — Deep black, shining; pubescence pale; hind tarsi except 

 base and apex, dirty white ; front with distinct, shallow punctures, 

 furrowed from before anterior ocellus to a slight prominence just 

 behind antennae ; first joint of flagellum about as long as the two 

 following united ; space between eyes above about equal to length 

 of first joint of flagellum, beneath at clypeus it is somewhat less; 

 clypeus carinated down middle, somewhat depressed laterally, its fore 

 margin in the middle subtruncate; face and clypeus with silvery 

 pubescence ; thorax is distinctly punctured ; middle segment with 

 the posterior surface transversely striated, carinated laterally, parted 

 by a deep furrow, the upper surface slightly depressed apically, sides 

 apparently smooth; abdomen rather slender, much more elongate 

 than in allied species, first segment slender, somewhat nodose at 

 apex, fully one-third longer than second segment; the abdomen 

 widens gradually from apex of first segment ; wings fuscous, with 

 blue reflection, pale at base and apex. Length 17 mm. 



$ . — Colored like 9 > the wings considerably darker ; clypeus 

 squarely produced, sub-tridentate ; antenna? short, clavate, firstjoint 

 of flagellum curved, apical joint about as long as the three preceding 

 ones united, these latter broader than long ; thorax finely punctured ; 

 middle segment except sides entirely transversely striate, but finely 

 so above at base, where it is also punctured ; hind femora sublami- 

 nated beneath toward apex ; abdomen stouter, and probably shorter 

 than in 9 (segments three et seq. missing), the first segment not 

 spinose beneath. Length about 16 mm. 



Maruru (April) ; Santarem. Three 9 , one $ , specimens. 



Trypoxylon insolitum n. sp. 



9 . — Black ; sides of the first segment and second and third more 

 or less, pale reddish, or testaceous : pubescence of thorax pale, and 

 rather dense ; face and clypeus densely silvery, including the 

 emargination of eyes ; front with unusually coarse transverse rugae 



