1902.] NATURAL SCIENCES OF PHILADELPHIA. 735 



sericeous. Second submarginal cell almost narrowed to a point on 

 the cubitus. Wings smoky, bluish and iridescent in certain lights. 

 Black with a bluish cast. The legs black. 



Type, Coll. Acad. Nat. Sci. Philadelphia. 



Type locality, San Pedro, Cal. 



One c?, July 27, on Euphorbia. Much like A. cylindricus 

 Cress., but that is duller and has a petiolale submarginal cell. 

 Anoplius (Pompilinus) marginatus Say. 



One &, San Pedro, July 11. 



Pedinaspis planatus Fox. 



Two dd", La Jolla, August. First record of the d. Aside 

 from the ordinary sexual characters this is just like the female. 

 Vespa oocidentalis Cress. 



La Jolla, August. One ? . 



Ancistrocerus halopMla n. sp. 



Clypeus finely, head and thorax above closely, coarsely punc- 

 tured. Sides of metathorax produced, but not into a sharp point. 

 Black on second abdominal segment hour-glass pattern. 



J.— Length, 9 mm. Clypeus bidentate, sparsely punctured, 

 slightly produced across the middle, with sparse rather long slender 

 hairs. Front and vertex with close coarse punctures, dull pilose, 

 space between posterior ocelli a little larger than that between 

 them and nearest eye-margin, head posteriorly bounded by a strong 

 margin which joins the malar space close to the margin of the 

 eye. First joint of flagellum about one and a half times as long 

 as the second. Angles of the prouotum, produced though not 

 sharply. Prouotum, mesonotum and dorsulum almost uniformly, 

 coarsely and closely punctured, pilose like head, the dorsulum with 

 a median impressed line anteriorly ; tegulte shining, sparsely punc- 

 tured, mesopleurre more closely punctured and less distinctly than 

 mesonotum, pilose, metapleurte rugulose dull, the middle of the 

 margin produced into a short blunt tooth. The posterior face or 

 basin of metathorax enclosed by well-defined margins laterally, 

 roughened, dullish, a median raised line extending up three-fourths 

 its height, and diverging into two raised lines before the upper 

 margin of the basin. Tarsal claws cleft. Wings subfuscous, 

 marginal cell and an apical margin near the marginal cell deeply 

 clouded, nervures of basal half of wing and stigma yellowish 



