1865.] 459 



3. Ammophila mediata, n. sp. 



Deep black: head with black, thorax with obscure cinereous pubescence: 

 first and second segments of abdomen ferruginous ; wings hyaline, apical mar- 

 gins dusky. 



Female. — Robust, deep black, shining; head broad, clothed with 

 .sparse black pubescence ; clypeus large, the apical margin broadly 

 rounded ; mandibles and antennae entirely black. Thorax : pro- and 

 mesothorax indistinctly sculptured, the latter with a well impressed 

 central, longitudinal line; scutellum subrugose; pleura and rnetathorax 

 with short, obscure cinereous pubescence, the enclosed space of the 

 latter much depressed, shining and obliquely striated, and on each side 

 of the apex a spot of dense cinereous pubescence ; tegulae shining black. 

 Wings hyaline or subhyaline, with the apical margins more or less 

 dusky; nervures blackish. Legs slightly pruinose, with sparse black 

 pubescence; tarsi piceous. Abdomen rather robust, black, with a faint 

 tinge of blue ; the first, except base, and the second segment entirely, 

 rufo-ferruginous; the tip of the second segment is sometimes infus- 

 cated. Length 8} — 9i lines; expanse of wings 10 — 10i lines. 



Male. — Resembles the female, but much more slender, with the face 

 narrower, densely clothed with silvery pubescence, and the antennae 

 longer. Length 8 lines. 



Six 9 j three $ specimens. Closely resembles the preceding species, 

 but the form is more robust, and the pubescence of the head is entirely 

 black. 



;». Ammophila Gryphus, Smith. 



Ammophila Gryphus. Smith. Brit. Mus. Cat. Hym. iv, p. 222. 

 One 9 specimen. In this specimen the first segment of abdomen, 

 except base, the second entirely, and the third, except a large triangular 

 black mark covering nearly the entire upper surface, are rufo-ferrugi- 

 nous ; the pro- and mesothorax are not so deeply striated transversely. 

 It is scarcely more than a variety. 



10. Ammophila strenua. n. sp. 



Large, black : tubercles, posterior margin of pleura, and a spot on each side 

 of rnetathorax at tip, silvery: wings subhyaline, margins fuliginous: first, 

 second and third segments of abdomen ferruginous. 



Female. — Robust, black ; head broad, clothed with long, sparse, 

 black hairs; clypeus flattened; mandibles and antennae entirely black, 

 the latter subsericeous ; the cheeks and face have a very fine, silvery- 

 cinereous pile, more obvious in certain lights. Thorax very finely and 

 indistinctly sculptured ; the pleura and rnetathorax clothed with a short 

 cinereous pubescence ; the tubercles, an oblique line on the pleura pos- 

 teriorly, and a spot on each side of rnetathorax at tip, silvery ; meso- 



