A. TULLGREN, HYMENOPTERA ACULEATA FROM THE CAMEROONS. 441 



front is punctured nearly rugose (1. c. p. 246: fronte punc- 

 tato subrugosa) and the abdomen sparsely punctured. By S. 

 nigricans there is no punctuation neither on tbe front nor on 

 the abdomen. Perhaps, however, the two species are iden- 

 tical, but the description published by Gribodo is a little in- 

 sufficiant for a sure determination. 



Pompilus Fabr. 



Fabricius, Suppl. entom. system. 1798, p. 212 et 246. 

 Kohl, Die Gattungen der Pompiliden, Yerh. zool. bot. 

 Ges. Wien. Bd 34, 1884, p. 50. 



P. bifasciatus Tullgr. n. sp. (Pl. 23, fig. 6 a, b). 



Of this species the collection contains a single female 

 from Itoki ( 8 /2 1891). To judge from the description of P. 

 Bitsemse D. T. (= elongatus Bits) published in Tijdschr. voor 

 Entomol. Bd 17, 1874, p. 188 by Bitsema it is very similar 

 to that species. But since only a male of P. Bitsemöe is 

 known hitherto I describe it as new for science. 



Female. — Bluish black; the mouth-parts, the clypeus 

 and the face nearly up to the ocelli dark brown; the an- 

 tennas brown with a darker tint on the dorsal side; the pro- 

 notuin dark brown especially at the sides and at the poste- 

 rior margin on the back a yellow band on each side; the 

 legs dark brown with a blackish tint on the dorsal side. The 

 other parts black, bluish or golden brownish in certain lights. 

 The wings yellow hyaline with large fuscous apical spöts. 

 The costa nearly black, the other nervures yellowish. 



The pubescence short and thin, blackish. 



The clypeus convex very broad, nearly elliptical with the 

 upper margin arcuate, the lower one nearly straightly trun- 

 cated. The labrum is not visible. The front above the base 

 of the antenme with a short but deep vertical furrow. The 

 eyes touch the base of the mandibulse. The interval between 

 the posterior ocelli nearly as long as the distance from the 

 eyes. The longest interval between the eyes on the vertex 

 about 3 /4 of the length of the second joint of flagellum, about 

 as long as the third joint. 



Arkir fur zoologi. Bd 1. 33 



