1865.] 486 



11. Crabro atrifrons, n. sp. 



Black, deeply punctured: scape of antenna;, tubercles, tibise, and bands on 

 abdomen, the first three interrupted, yellow; wings dusky. 



Male. — Black, opaque, with crowded, deep punctures, slightly pube- 

 scent ; head quadrate, scarcely wider than the thorax ; clypeus fringed 

 with a pale pubescence; antennae simple, scape yellow with a black line 

 behind, the flagellum fulvous beneath. Thorax immaculate, except a 

 yellow spot on tubercles and two obscure brownish spots on the collar ; 

 metathorax coarsely reticulated, the sides longitudinally striated ; tegulae 

 brownish. Wings dusky hyaline ; nervures fuscous. Legs black, 

 shining; tips of the four anterior femora, especially of the anterior pair, 

 all the tibiae, except beneath, and base of tarsi, yellow; posterior tibiae 

 with a black line on the outside; rest of tarsi dusky-testaceous, blackish 

 at tips ; anterior tarsi with the basal joints slightly testaceous. Abdo- 

 men subsessile, elongate-ovate, convex, closely and finely punctured ; 

 each segment, except the last, with a median yellow fascia, interrupted 

 in the middle on the three basal segments, entire on the rest; apical 

 segment obtusely rounded, with a yellow dot on each side j venter im- 

 maculate. Length 4 lines; expanse of wings 6 J lines. 



One specimen. 



12. Crabro atriceps, n. sp. 



Black ; clypeus silvery ; two spots on collar, tubercles, interrupted line on 

 postscutellum, line on tibiae, and an interrupted fascia on the second and three 

 following segments of abdomen, yellowish : wings hyaline. 



Female. — Deep black, opaque, densely and very minutely punctured. 

 slightly pubescent; head quadrate, wider than the thorax; sides of the 

 face and the clypeus silvery ; mandibles and antennae entirely black. 

 Thorax: mesothorax with two slightly elevated longitudinal lines on 

 the middle, having a channel between them ; two short transverse lines 

 on the collar, tubercles, and a slightly interrupted line on the protho- 

 rax, sometimes wanting, yellow; pleura and sides of metathorax with 

 fine dense longitudinal striae ; metathorax with a deep longitudinal 

 channel and a few obliqne elevated lines at base above, the channel 

 itself is transversely striated; tegulae piceous. Wings hyaline, faintly 

 tinged with dusky; nervures fuscous. Legs black; tibiae with an ex- 

 terior yellow line. Abdomen subsessile, ovate, convex, shining, very 

 minutely punctured ; second and three following segments each with 

 a sub-basal yellow fascia, more or less interrupted on the second, third 

 and fourth segments, and confluent on the fifth segment; in one spe- 

 cimen the fasciae, except on the fifth segment, are very widely inter- 

 rupted ; basal and apical segments and the venter immaculate ; the 

 apical segment produced into an elongate obtuse spine, which has a 



