326 PROCEEDINGS OF THE NATIONAL MUSEUM. vol. xxxi. 



lights; its first segment about one and a half times the length of the 

 second; third segment of the filament slightly shorter than the second, 

 about onc-Hfth longer than the fourth; mandibles long, .stout, })lack- 

 ish, streaked longitadinally with ferruginous, three-toothed, the middle 

 tooth rather more slender than the anterior one; with a row of punc- 

 tures from the base to the base of the anterior tooth and another along 

 the ventral face, with a few black hairs on the posterior side. 



Thoixi^t'. — Collar large, thick from front to rear, its anterior face not 

 vertical, though aliout at right angles to the portion of the neck near- 

 est; evenly rounded from side to side and somewhat appressed against 

 the mesonotum; its surface blackish sericeous, closel}', minutely punc- 

 tured, and with a few somewhat coarser, scattered punctures; protho- 

 racic lobe with a few, small, scattered punctures and a well developed, 

 dense fringe of short, pale brown hairs on its posterior edge; near its 

 base is a trace of aciculation, the grooves running downward and back- 

 ward; this is more pronounced on the propleuron just in front, and on 

 the mesopleuron just above the lobe and below the tegula, where the 

 grooves run backward but only slighth' downward; mesonotum very 

 minutely punctured and also with. a few coarser punctures and scat- 

 tered, short hairs; its median groove about one-fifth as long as the 

 plate itself, deep, narrow, sharp-edged; a faint line extending back- 

 ward from it; lateral edges with a slightly refiexed rim from in front 

 of the fcegulte backward, then inward to where the scutellum rises to 

 the level of the mesonotum; scutellum rounded, higher than the meso- 

 notum, with a median groove; its dorsal surface minutely punctured 

 and with a few slightl}^ coarser ones as well; at the sides behind, it is 

 ver}^ finely, obliquely aciculate; postscutellum narrow, evenly rounded, 

 finely, transversely aciculate; median segment dorsum forming a 

 rounded point at the small, triangular fovea; its surface more coarsely, 

 transversely aciculate than the plates anterior to it; a faint median 

 depression is present near the middle and hinder end, but between 

 these places it is still fainter, and in front there is no trace of it; the 

 aciculation is coarsest in front; posterior end of median segment 

 slightly, transversely aciculate, with numerous rather large punctures 

 and long hairs; sides of median segment closely, rather finely aciculate 

 and with numerous hairs of medium length; stigmatal groove absent 

 and the aciculations continued directl}" onto the metapleura which are 

 tinel}'- aciculate, the grooves running forward and downward; meso- 

 pleuron behind the prothoracic lobe very finely aciculate, the grooves 

 running forward and downward; the lower portion to the mesocoxaj 

 roughened, with a faint trace of nearly vertical aciculation and with 

 numerous, short, black hairs; portion of motapleuron next the base of 

 the hind wing moi'c coarsely aciculate than elsewhere; mesosternum 

 with a pronounced median longitudinal lidge, minutely, closely punc- 

 tured and also with numerous coarse punctures and long hairs; petiole 



