1903.] NATURAL SCIENCES OF PHILADELPHIA. 243 



than broad, with straight posterior border. Mandibles 5-toothed. 

 Clypeus moderately convex, its anterior border with a small but dis- 

 tinct excision in the center and a distinct median carina extending 

 nearly its full length. Antennae 12-jointed; scape reaching the pos- 

 terior corner of the head; first funicular joint as long as joints 2-4 to- 

 gether; second joint as long as broad ; joints 3-8 nearly as long as broad; 

 club distinctly 3-jointed, first and second joints subequal, together a lit- 

 tle shorter than the terminal joint. Thorax rather long and narrow, 

 widest in front where the humeral angles are sharp and prominent. In 

 profile the pronotum rises very abruptly from the neck, so that a trans" 

 verse ridge is formed which gives the thorax a square-shouldere 

 appearance; dorsum flatly and evenly rounded, without mesoepinotal 

 constriction. Epinotal spines well-developed, longer than broad at 

 their bases, tapering and pointed, directed distinctly backward though 

 slightly upward and outward ; in profile the ventral outline of the spines 

 is distinctly concave, the dorsal convex. They are about as long as 

 their distance apart at the base. Petiole about 1^ times as long as 

 broad, distinctly broader behind than in front when seen from above; 

 in profile the height of the node is fully equal to the length of the whole 

 joint; its anterior surface is steep and somewhat concave, the top of 

 the node abruptly truncated, the posterior slope so steep that it is 

 even inclined forward below and forms somewhat less than a right 

 angle with the extreme posterior dorsal surface of the petiole; ventral 

 tooth well developed, directed downward. Postpetiole hardly twice 

 as broad as the petiole, distinctly broader than long ; its anterior wider 

 than its posterior border, its anterior angles rather prominent. Gaster 

 of the usual shape. 



Mandibles not distinctly striated; shining, with a few coarse punc- 

 tures. Clypeus shining, longitudinally rugose on the sides. Head 

 very smooth and shining, covered with rather coarse but sparse 

 piligerous punctures ; sides of frontal area, cheeks and subocular region 

 subopaque and delicately longitudinally rugose. Pro- and mesonotum 

 very smooth and shining, with a few piligerous punctures passing over 

 onto the pleurae into delicate longitudinal rugae, which become much 

 coarser and distinctly reticulate on the sides and whole upper surface 

 of the epinotum. Petiole and postpetiole opaque, reticulate and 

 punctate-rugose. Gaster very smooth, shining. 



Hairs white, only moderately abundant; clavate and erect on the 

 thorax and crown of head, somewhat longer and more reclinate on 

 the pedicel and gaster; the hairs on the sides of the head, antennae and 

 legs non-clavate, appressed; those on the clypeus thin and projecting. 



