33() PROCEEDINGS OF THE NATIONAL MUSEUM. vol. xixi. 



and glistening, and the side of the colhir above this tubercle is black 

 pul)escent; prosternuni coarsely, quite closely punctured, and with 

 many long, dull white hairs; niesonotum with its lateral and hinder 

 margins from the prothroracic lobe back strongly reflexed, with parap- 

 sidal lines evident and with a distinct and rather broad median groove, 

 broadest anteriorly; surface of the uiesonotum marked with well- 

 developed ridges, which near the median groove run parallel to it, but 

 farther out diverge backward and near the anterior edge of the plate 

 become almost transverse, the ridges seemingly radiating from two 

 centers, one on each side of the central median groove and close to the 

 anterior edge of the plate; scutellum high in the middle, with a median 

 groove making it distinctl}' bituberculate; the surface with minute 

 punctures and with faint, oblique aciculations at the sides; the tips of 

 the tubercles somewhat glistening; postscutellum narrow, minutely 

 punctured, quite closel}' covered with short, dull white hairs; median 

 segment dorsum rather coarsely, transversel}^ striate, with rows of 

 medium sized punctures between the strii>?; its surface quite thickly 

 covered with long, delicate, whitish hairs; with a median depression 

 along the entire length of the plate; angle between the doi'sum and the 

 posterior end of the median segment <|uite sharp, but greater than a 

 right angle; the end coarsely, transversely striated; fovea small, cir- 

 cular; posterior end clothed like the dorsum; an impressed line extends 

 backward at the side of the dorsum from the postscutellum to the 

 stigma, but is absent from there to the fovea; from above the posterior 

 coxffi a ridge extends forward and slightly upward toward the base of 

 the hind wing, below which the bod}^ is narrower than above the 

 ridge; the stri* of the dorsum of the median segment are continued 

 laterally over this ridge onto the metapleura, where they run ol)liquely 

 forward and downward, being strongest near the ridge; mesopleura 

 coarsely striated, the striae curving around the front of the mesocoxte 

 and extending a short distance transversely on themesosternum, which 

 is coarsel}^ punctured; more anteriorly on themesosternum the strias 

 are more radiating in arrangement; petiole black, straight, rather 

 sparsel}^, minutely punctured, and with numerous short, whitish hairs; 

 longer than the second hind tarsal segment. 



Ahdoinen. — Pale ferruginous yellow, darker at the sides and behind 

 than on the first two segments; stout; elongate pointed behind, rather 

 more blunt in front; rising high and nearly at right angles from the 

 petiole; above; glistening, minutely whitish sericeous at the sides of 

 the second and more posterior segments; surface with a few scattered 

 punctures, ))ecoming more evident on the hinder segments; terminal 

 plate with a few long ])lack hairs, its hinder end rounded conical; 

 beneath; color as above, with a tendency to blackish on the posterior 

 latei-al angles, and with the posterior margins of the plates slightly 



