460 [June 



thorax with the dorsal Hue deeply impressed ; scutelluin sparsely punc- 

 tured, with a slight depression on the disk ; metathorax closely and 

 finety punctured, the enclosed space covered with very fine oblique 

 striae ; tegulas shining black. Wings hyaline, tinged with fuliginous, 

 the apical margins fuliginous. Legs black, rather densely clothed with 

 a very fine silvery-cinereous pile, brilliant on tbe coxae ; tarsi some- 

 what piceous. Abdomen elongate, robust at tip, black, subsericeous ; 

 the first segment, except base, and the second and third segments en- 

 tirely, bright ferruginous. Length 11 k lines; expanse of wings 13; 

 lines. 



One specimen. 



11. Ammophila macra, n. sp. 



Large, slender, black ; sides of the first, and the lateral margins of the second 

 and third segments, ferruginous : pro- and mesothorax transversely striated ; 

 wings subh valine. 



Male. — Elongate, very slender, black ; head clothed with black pu- 

 bescence, the face silvery ; clypeus obtusely emarginate ; mandibles 

 and antennae entirely black, the latter sericeous. Thorax : pro- and 

 mesothorax covered with coarse transverse striae, the scutellum with 

 coarse longitudinal striae ; pleura and metathorax rugose, clothed with 

 cinereous pubescence, more dense and silvery on the tubercles, and 

 posterior margin of pleura ; enclosed space of metathorax rugose on 

 the disk, and obliquely striated on each side ; tegulae shining black. 

 Wings hyaline or subhyaline. with the apical margins darker. Legs 

 black, pruinose, the coxae silvery, the tibiae sericeous within, the tarsi 

 somewhat piceous. Abdomen elongate and very slender, compressed, 

 black, shining, subsericeous ; sides of the first and the lateral margins 

 of the two following segments, more or less ferruginous ; the petiole 

 long and slender, black and polished. Length 11 — 12 lines; expanse 

 of wings 10] — lo] lines. 



Four specimens. Easily recognized by the elongate, very slender 

 form, and the coloration of the abdomen. 



12. Ammophila juncea. n. sp. 



Elongate, slender, black: head and thorax densely clothed with silvery-cine- 

 reous pubescence: sides of the first and second segments of abdomen, and late- 

 ral margins of the third, ferruginous: wings hyaline, subviolaceous ; pro- and 

 mesothorax almost smooth, shining. 



Mal<:.— Elongate, slender, black ; head and thorax densely clothed 

 with silvery-cinereous pubescence, more dense on the face, tubercles 

 posterior margin of pleura and tip of metathorax ; clypeus emarginate ; 

 maudibles and antennae entirely black. Thorax finely and closely punc- 

 tured, the pro- and mesothorax almost smooth, shining, the latter with 



