H. W. LEWIS. 185 



% .—Differs from tlie fenirtle in having the clypeus very flat, all the face, the 

 breast and the coxae beneath, yellow, the front of the femora reddish yellow; 

 the underside of the antennae yellow, or reddish yellow. Length 20 mm. 



Worl-er. — Similar to the female, but somewhat smaller. Length 18 mm. 



M. deSaussure has given the following descriptions of varieties: 



Var. Worker.— Two yellow lines on the metathorax. 



Var. A. — Border of the tegulse indistinct, first segment of the antennse red ; 

 postscutelliim ornamented with two yellow points. 



Var. B. — Abdomen black, border of the second segment unmarked, the lateral 

 spots red. 



Var. C. — Prothorax, clypeus and border of the third segment of the abdomen 

 red. 



Var. D. — A mark under the wings, two points on the scutellum yellow ; meta- 

 thorax with two yellow lines. 



Var. E. — Marks of the abdomen large, melting with the borders which are red. 



Var. F. — All the segments of the abdomen bearing a red mark on each edge. 



Var. G. — All the segments red, their base black, their borders more or less em- 

 broidered with whitish yellow. 



Var. H. — Mesothorax and abdomen red ; no yellow ou the insect; base of the 

 second segment black. 



Var. I. — Metiithorax red, with two yellow lines; scutellum marked with yellow. 

 Abdomen I'ed. 



Var. J. — Abdomen chestnut, the first segment embroidered with yellow ; two 

 yellow points on the metathorax. 



Var. K. — Marks on the second segment of the abdomen white. 



Var. L. — Large; abdomen ferruginous, with four quite large yellow borders : 

 metathorax with two yellow bands ; antenna; a little gray above. 



Hab. — United States, Canada. 



P. metrica Say. — Ferruginous. Abdomen black. Wings dark violaceous ; 

 body ferruginous: antennae fuscous, first and second joints ferruginous beneath, 

 last five or six joints fulvous beneath ; hypostoma with a few distant, short, yel- 

 low hairs, not sericeous, at the middle of the tip a little prominent. Thorax with 

 a black dorsal line abbreviated behind, each side of which is an obsolete line con- 

 fluent behind, exterior to which at the base is a black line attenuated before and 

 abbreviated. Wings dark violaceous. Feet black, tibise within, except posterior 

 pair, knees and tarsi yellowish. Abdomen black, first segment absolutely piceous 

 each side and on the posterior edge, second segment also with obscure ferruginous 

 on each side, sometimes obsolete. Length over four-fifths of an inch. 



Hab. — United States. 



P. minor Beau v. — Worker. — Insect ferruginous; clypeus yellow, with a fer- 

 ruginous mark ; mandibles yellow ; orbits broadly bordered with yellow ; an- 

 tennae black above at the middle, nearly to the end ; the borders of the prothorax, 

 tegulfe, and a point under the wings, the anterior border of the scutellum. the 

 postscutellum and two large marks, which cover the posterior plate of the meta- 

 thorax, yellow. Abdomen short, oval, de])ressed, the first segment broadly bor- 

 dered with yellow, this border bearing a large, square, or tricuspid indentation ; 

 the three following segments ornamented at the borders with little festoons, the 



TRANS. AM. ENT. SOC. XXIV. (24) JUNE, 1897. 



