1865.] 167 



as above, except that the basal segment is entirely yellowish, with its 

 posterior face flat, triangular and carinated on each side. Length Gi| 

 lines; expanse of wings 11 J lines. 



Collection. — Ent. Soc. Philad. One specimen. 



This may be only a % variety of P. lineatus, but it is much smaller, 

 slenderer, and somewhat differently marked, with the base of the first 

 segment of the abdomen more slender and the second segment rather 

 suddenly narrowed at base. 



Genus POLYBIA, St. Farg. 

 Polybia phthisica, Fabr. 



Vespa phthisica, Fabr. Ent. Syst. ii, p. 281. 



Polistes phthisica, Fabr. Syst. Piez. p. 278. 



Polybia phthisica, Sauss. Guep. Soc. p. 186, pi. 23, figs. 7 — 8. 



Vespa cajennensis, Fabr. Ent. Syst. Suppl. p. 265. Coqueb. 111. Icon. Ins. p. 62, 



pi. 15, fig. 3. 

 Polistes cajennensis, Fabr. Syst. Piez. p. 280. 

 Polistes hectica, Fabr. Syst. Piez. p. 278 

 Vespa ochrosticta, Weber. Obs. Ent. p. 10-1. 

 Vespa fasciata, Oliv. Ency. Meth. vi, p. 676. 

 Polistes fasciata, St. Farg. et Serv. Ency. Meth. x, p. 172. 

 Polistes fulvo-fasciaJa, Latr. Gen. Crust, et Ins. iv, p. 142. 

 Collection. — Ent. Soc. Philad. Two $ , one % specimens. 

 The specimens before me of this species are pale yellowish-ferrugi- 

 nous, with the yellow markings generally more or less indistinct. 



Polybia cubensis, Sauss. 



Polybia cubensis, Sauss. Mon. Guep. Soc. p. 202, pi. 25, figs. 5—6. Guer. in 

 LaSagra's Hist. Cuba, p. 774. 

 Collection. — Ent. Soc. Philad. Nine ( £ $ ) specimens. 

 The nest sent as belonging to this species, is shaped very similar to 

 that figured by Saussure (Mon. Gruep. Soc. pi. 4, fig. 3a) as the nest of 

 Icaria variegata. 



Fam. ANDRENID^E. 



Genus COLLETES, Latr. 

 Colletes submarginata, n. sp. 



Black, clotbed witb whitish pubescence, disk of tborax with black pubescence : 

 legs piceous; wings hyaline; abdomen polished, apical margins of the segments 

 above fringed with white pubescence, broadly interrupted on the middle of the 

 three basal segments. 



Female. — Black ; head closely and rather finely punctured, clothed 

 with whitish pubescence, long and dense on the cheeks and beneath, 

 shorter on the face and more dense and subappressed on the sides of 

 the face, on the vertex the pubescence is more or less black ; clypeus 



