462 [June 



fuliginous, violaceous, especially on the apical margins which are 

 broadly dark fuliginous ; posterior wings hyaline, the apical margin 

 broadly fuliginous. Legs black, shining, spinose, tarsi piceous. Abdo- 

 men ovate, robust, petiole short; the fust, second, third, and the an- 

 terior half or two-thirds of the fourth segment, bright ferruginous ; the 

 petiole and rest of abdomen, black. Length 8h lines ; expanse of wings 

 11 lines. 



Eight specimens. 



15. Ammophila communis, n. sp. 



Black : head and thorax with rather dense black pubescence : first, second. 

 and sometimes the third and fourth segments of abdomen, ferruginous: wings 

 hyaline, dusky at tip : petiole of abdomen long. 



Male. — Deep black ; head and thorax rather densely clothed with 

 black pubescence, and closely and finely punctured ; face silvery ; man- 

 dibles and antennae entirely black, the latter subsericeous ; mesothorax 

 with a well-impressed central longitudinal line; pleura and metathorax 

 clothed with cinereous pubescence, slightly mixed with black ; meta- 

 thorax rugose, the enclosed space also rugose, scarcely striated ; tegula? 

 shining black. Wings hyaline, subviolaceous, sometimes more or less 

 tinged with fuliginous ; apical margins broadly fuliginous. Legs en- 

 tirely black, slightly pruinose, the tarsi sometimes piceous Abdomen 

 subeompressed, often more or less sericeous; the first, second and basal 

 half of the third segment, bright ferruginous ; sometimes the whole of 

 the third and basal half of the fourth segments are ferruginous. Length 

 6 — 8 lines; expanse of wings 8 — 11 lines. 



Forty % specimens. This may be the % of the preceding species, 

 but in this species the pubescence of the pleura and metathorax is 

 cinereous, while in robusta it is entirely black. 



16. Ammophila luctuosa, Smith. 



Ammophila luctuosa, Smith, Brit. Mus. Cat. Hym. iv, p. 224. 

 Twenty-six $ specimens. The wings vary from smoky-hyaline to 

 dark fuscous, with a more or less violaceous reflection, and the abdomen 

 has often a beautiful bluish tinge. It also varies much in size. 



i 7. Ammophila argentifrons. n. sp. 



Black, slightly tinged with bluish : face, legs, and abdomen in certain lights, 

 silvery-sericeous; wings subhyaline, violaceous. 



Male. — Deep black, often with a more or less deep blue or violet 

 reflection; face broad, densely clothed with appressed silvery pile, the 

 rest of the head with rather long and black pubescence ; anterior mar- 

 gin of clypeus broadly subtruncate ; mandibles and antennae black. 

 Thorax closely and strongly punctured, rather thickly clothed with 



