1865.] 461 



a slightly impressed longitudinal central line; seutellum punctured, 

 channelled down the middle ; enclosed space of the metathorax very 

 finely and transversely aciculate. flattened, without pubescence ; re- 

 mainder of the metathorax as well as the pleura, with rather dense 

 silvery-cinereous pubescence ; tegulae shining black. Wings hyaline, 

 with a slight violaceous reflection ; apical margins dusky. Legs black, 

 pvuinose, the coxae silvery, the tarsi piceous. Abdomen elongate, slen- 

 der, black, subsericeous ; the first and second segments, except a black 

 line on the upper edge, and the lateral margins of the third segment, 

 bright ferruginous; petiole long and slender, piceous towards the tip. 

 Length 10 lines; expanse of wings 11 lines. 



One specimen. Closely allied to A. macra, but smaller, with the 

 pro- and mesothorax smooth and shining, and not transversely striated. 



'',\. First segment of abdomen short and dilated ; petiole slender and cylindrical. 



13. Ammophila valida. n. sp. 



Large, robust, black : abdomen, except petiole, ferruginous : wings yellowish- 

 fuscous. 



Female. — Large robust, deep black, shining, clothed with short, 

 sparse, black pubescence; head large, broad, closely punctured ; cly- 

 peus large, margined anteriorly, with two distaut, rather large, obtuse 

 teeth, and several smaller ones between them ; mandibles and antennae 

 entirely black. Thorax closely and strongly punctured, deeper on the 

 pleura; sides of the prothorax striated ; tubercles polished; sides of 

 mesothorax posteriorly, rather deeply grooved longitudinally, as well as 

 a well-impressed central line ; seutellum punctured, depressed on the 

 disk ; metathorax large, opaque, rugose, the inclosed space obliquely 

 rugose; tegulaj black, shining, broadly margined behind with testaceous. 

 Wings yeliowish-fuscous. darker and subviolaceous on the apical mar- 

 gins. Legs robust, black, shining, spinose, the tarsi piceous. Abdo- 

 men ovate, robust, entirely ferruginous; the petiole rather short, black. 

 Length 10 lines; expanse of wings 15 J lines. 



Two specimens. A large robust species, having much the general 

 appearance of a large specimen of Priononyx Thomse. 



It. Ammophila robusta, n. sp. 



Eobust, black ; first, second, third and part of fourth segments of abdomen, 

 ferruginous ; wings subhyaline, violaceous, apical margins fuliginous. 



Female. — Robust, deep black, shining, with black pubescence ; head 

 closely punctured ; anterior margin subtruncate. Thorax : pro- and 

 mesothorax sparsely punctured, shining ; pleura closely punctured, 

 subopaque ; metathorax opaque, finely rugose, transversely aciculate 

 above ; tegula? shining black. Wings hyaline, more or less tinged with 



