AC^ENITUS. 41 



Table of Species. 



1 (4) Head and thorax black; metanotum 



fully costate. 



2 (3) Wings with substigmal cloud ; hind 



tibi?e pale red yrandipes, sp. n., p. 41. 



3 (2) Wings with no cloud ; hind tibiae 



black alecto, sp. n., p. 42. 



4 (1) Head and thorax flavous ; metanotum 



only basally costate. 



5 (6) Xervelet wanting ; metanotum gla- 



brous .ranthorius, sp. n., p. 43. 



6 (o) Nervelet distinct ; metanotum roughly 



punctate . biumbratus, sp. n., p. 44. 



10. Acsenitus grandipes, sp. n. 



5 . A handsome black species with pale-banded antennae andi 

 body, spotted wings, and fulvidous legs. Head stout, with the 

 distinctly bordered occiput narrower than the internally entire- 

 eyes ; vertex smooth, with a few isolated punctures, frons gla- 

 brous and very strongly carinate to the rugose and white face ;. 

 frontal and external orbits, cheeks, and the apically truncate 

 clypeus white ; mandibles black, strongly striate, and apically 

 attenuate. Antennce filiform throughout, black, with the ninth 

 to twenty-second flagellar joints, and the scape beneath, white ;. 

 apices ferruginous and abruptly obtuse. Thorax black, unevenly 

 punctate, with short white pilosity ; mesonotum somewhat dull, 

 discally rugose, with its notauli deeply impressed and their 

 central lobe vertical ; metathorax strongly costate, with the 

 areola small and exactly quadrate; petiolar area reaching beyond 

 centre, laterally sinuate, apically glabrous, and basally trans- 

 aciculate ; lateral arese irregularly costate ; apophyses obtuse ; 

 spiracles large and linear, circum costate. Scutelluin black, with 

 a few large punctures, laterally carinate to the centre, with its 

 basal fovea bicarinate and its extreme apex obscurely testaceous ; 

 postscutellum glabrous and entirely stramineous. Abdomen nar- 

 rower than the thorax, nitidulous and subim punctate, with the 

 apices of all the segments broadly flavous ; basal segment sparsely 

 and longitudinally punctate laterally, with the spiracles before its- 

 centre; gastrocoeli foveiform ; venter flavous, with the hypo- 

 pygium spinous and extending over the base of the centrally 

 testaceous terebra to beyond the pygidium ; terebra longer than 

 the abdomen. Legs : anterior pair entirely stramineous, with the 

 apices of the onychii and of the bifid claws alone infuscate ; 

 hind legs fulvous with the coxae, apices of trochanters, of femora^ 

 of the curved tibiae and extreme base of the last, black ; coxse 

 internally above, base of trochanters, and the tarsi, except their 

 simple claws, white. Wings infuscate-hyaline, with a mark below 

 the black stigma and the apices of both pairs distinctly infumate ;. 

 radix testaceous, tegulse white, nervelet obsolete ; the bifenestrate- 

 second recurrent nervure intercepting the cubital, but slightly 



