322 PROCEEDINQS OF THE NATIONAL MUSEUM. vol.52. 



swollen, the upper margin distinctly, but sometimes not prominently- 

 drawn upward and forward in front to form a short obtusely angled 

 tooth; labrum black or blacldsh, shining, sparsely punctate and hairy, 

 longer than wide; mandibles pale, apex black; beak black. 



Thorax. — Longer than high, red, the venter black; lateral lobes of 

 pronotum shining, closely punctate along the upper border, disk very 

 sparsely and faintly punctate, apical pits deep and distinct; pro- 

 epistema rather coarsely and roughly punctured, sliining, the apical 

 lobes smooth, only slightly expanded and somewhat blackish; parap- 

 sidal furrows distinct, not so very deep, although this varies, typi- 

 cally, at least, distinctly and even rather coarsely crenulate for their 

 whole length, even to the junction before the scutellar fossa, continued 

 to the scutellar fossa as a shallow groove, sometimes almost obso- 

 lete; median furrow of the middle lobe distinct but usually rather 

 shallow, the two lateral lobes flattened over part of their surface; 

 the whole mesonotum sliining and mostly smooth, very sparsely 

 punctured and hairy ; scutellar fossa more shallow than in some other 

 species, the front wall sloping to the mesonotum, with at least a large 

 median carina longitudinal to the body, and mth traces of several 

 others on each side of the middle one, these sometimes almost as 

 prominent as the median ridge; scutellum triangular, the sides and 

 apex rounded off; hind angles of the mesoscutum not prominently 

 produced; mesopleurae shining, distinctly punctured and hairy; 

 mesopleural groove rather deep, curving lightly upwards, coarsely 

 crenulate; venter distinctly and rather closely punctured and hairy, 

 black; metapleurae smooth and rather closely punctured above, 

 more coarsely, closely, and roughly punctured below, sliining; pro- 

 podeum with six longitudinal ridges, the two median nearly or quite 

 parallel for much of their length, converging suddenly in front, and 

 very gradually behind, connected by a varying number of transverse 

 ridges, and united with the lateral ridges on each side by a number of 

 transverse ridges; in many specimens there is exliibited a tendency 

 toward the formation of a fourth ridge on each side between the me- 

 dian and second ones; spiracles oval, but varying somewhat in shape. 

 Wings. — Length, average, fore 7.5 mm., hind 5.5 mm.; fuUginous, 

 venation as shown in figure. 



Legs, — Reddish, the trochanters black or blackish, more or less of 

 the fore and middle femora dark, extreme tips of hind femora, bases, 

 and apices of hind tibiae black, as are more or less of the extreme tips 

 of the middle tibiae, fore tarsi pale, middle tarsi blackish except the 

 bases, hind tarsi black; all tarsal claws black, fore and middle cleft, 

 hind large-toothed at base. 



Abdomen. — Elongate, lanceolate, slender, the first segment not 

 extremely long and narrow, the remainder as described for the genus, 

 sometimes more or less clouded irregularly with blackish infusion. 



