458 [June 



Eight 9 specimens. A very distinct species, readily recognized by 

 the deep black head and thorax, almost entirely destitute of pubescence. 

 The form is more robust than usual. 



6. Ammophila polita, n. sp. 



Black, subargenteous ; mandibles and tarsi piceous : abdomen, except base 

 and apex, ferruginous; wings subhyaline. 



Female. — Black; the face, cheeks, thorax beneath the wings, meta- 

 thorax except disk, and the legs more or less densely clothed with sil- 

 very-cinereous pile ; mandibles piceous, rufo-piceous in the middle ; 

 clypeus slightly prominent, with scattered punctures ; antennae entirely 

 black. Thorax opaque, the pro- and mesothorax with transverse, rugu- 

 lose striae; scutellum with coarse longitudinal stria?, and the enclosed 

 space of the metathorax glabrous, obliquely aciculate ; tegulae piceous. 

 shining. Wings sub- or fusco-hyaline, slightly darker on the apical 

 margin. Legs black ; the coxa? silvery-cinereous; tarsi piceous. Abdo- 

 men shining, ferruginous, the base of first segment and a more or less 

 extended blotch on the apical segments above, black. Length 7 lines; 

 expanse of wings 7 lines. 



Two specimens. Closely allied to the preceding species, but easily 

 distinguished by the silvery-cinereous pile of the head and thorax, and 

 by the general sculpture. 



7. Ammophila vulgaris, n. sp. 



Black, with silvery-cinereous pubescence, more dense on the tubercles, pos- 

 terior margin of pleura, sides of metathorax, and on the face in % ; wings sub- 

 hyaline; first, second and sometimes the third segments of abdomen ferrugi- 

 nous ; abdomen sericeous in the % . 



Female. — Black, subopaque, clothed with fine silvery-cinereous pu- 

 bescence, more dense on the tubercles, posterior margin of pleura, and 

 sides and tip of metathorax j head and thorax with sparse, rather fine 

 punctures ; clypeus slightly prominent ; mandibles and antennae en- 

 tirely black ; enclosed space of metathorax obliquely striated ; tegulae 

 piceous. Wings varying from hyaline to fuscous, with the apical mar- 

 gins darker. Legs black, slightly pruinose, the coxae and trochanters 

 silvery-cinereous, the tarsi sometimes piceous. Abdomen slightly seri- 

 ceous; the first, second, and often the third, more or less ferruginous; 

 petiole always black. Length 7-9 lines ; expanse of wings 8 J— 1 J lines. 



Male. — More slender than the female, with the face silvery, and the 

 abdomen with a more or less brilliant cinereo-sericeous pile, very fine 

 and more obvious in certain lights ; sometimes the sides of the fourth 

 segment is ferruginous. Length 7 — 8i lines. 



Twenty 9 , eighteen % specimens. 



