130 HYMENOPTERA ACULEATA. 



and finely pubescent, abdomen shining, nearly impunctate, 

 regularly ovate in the $ , sub-elongate in the (J, apical dorsal 

 valve in the ? acuminate and excavated, the extreme apex 

 piceous red ; tibiae of posterior legs irregularly spinose. 



L. 6-10 mm. 



Common and generally distributed, nests in decayed 

 ■wood and generally provides its larvra with a bright green 

 fly — Chry^omyiii polita. 



My attention was quite lately called to what must be a 

 large colony of this species in the transverse beam of a 

 garden- gate in a wall ; even as late as 5 p.m. in less than 

 two minutes six or eight females flew into apparently the 

 same hole, but I did not see any come out. 



C. pubescens, Shuck. — ^ like a small leucostoma, 

 but with the clypeus produced and pointed in the 

 centre, the face not channelled, although there is a 

 narrow impressed line running from the central ocellus 

 down the face; the head and thorax are rather more 

 hairy, and the central sulcature of the propodeum is cre- 

 nate, there are also slight indications of lateral crenatures 

 near the base ; lateral angles of seventh dorsal segment 

 much produced and exposed ventrally ; the anterior and 

 intermediate femora and tibiae are piceous, the former more 

 or less edged with black, extreme base of posterior tibiaj 

 externally flavous. I have not seen a ? . 



L. 7 mm. 



One (J Charlwood, Sun-ey ; one S taken in my garden 

 at Woking; one ^ from Shuckard's Collection; one ^ 

 Painswick, Gloucester; {Wathins). 



. I know of no other localities. The species is very distinct, 

 and will no doubt some day turn up more freely. 



C. cetratus, Shuck. — Black, shining, the calcaria and 

 the margins of the dilated anterior tibiae and metatarsi in 

 the (J whitish ; head and mesonotum punctured, rugosely so 

 in the $ , clothed with short, erect hairs ; propodeum longi- 

 tudinally rugose at the extreme base, its sides in the S 



