Heferof/jjna and Fossoridl Tljimenoptera. 243 



legs, and in liavino; the apex of the clypeus dull, whereas 

 in obtusiroitris it is shining. The obtuse emargination 

 of the prothorax separates it from exaltatus or notdtus, 

 and also the carinated apical ventral segment. 



Hah. — Chohham, and probably in other localities, but 

 I expect overlooked. 



7. parvidus, Dahlb. Hym. Eur. i. p. 460. 



<y very like the ^ of the preceding, but rather smaller, 

 and with the apical ventral segment narrow and trun- 

 at the apex, the sides not fimbriated, and the centre 

 keeled at the base. 



$ differs from all its allies by having no clear round 

 spot near the apex of the front wings, but has a dusky 

 streak running through the 2nd and 3rd submarginal 

 cells, and a dusky spot in the 3rd discoidal cell. There 

 is also a slight cloud across the base of the 1st submar- 

 ginal cell ; apex of the wdngs widely clouded. 



Hah. — Chobham ; Charlwood, Surrey ; Scotland. 



8. hyalinatus, Fab. Ent. Syst. ii. p. 212 =: fasciatdlus, 



Shuck. 



(? black, head finely and closely punctured ; pro- 

 thorax angularly emarginate behind ; mesothorax 

 posteriorly slightly raised down the middle ; metathorax 

 evenly rounded, covered with white silver}' hairs ; wings 

 more or less dusky, darker towards the apex ; abdomen 

 elongate, black, basal joint more or less covered with sil- 

 very j)ubescence ; legs with the posterior coxae silvery ; 

 femora sometimes entirely black, except the tips of the 

 front pair, sometimes nearly all red, tarsi dusky, first 

 joint of front pair red. Length 3 — 4 lines. 



$ black with a silvery gloss, two basal segments 

 of abdomen red, apex of the 2nd generally with a black 

 central spot, and the red colour sometimes extending at 

 the sides on to the 3rd segment ; head and thorax with 

 erect hairs ; prothorax arcuately emarginate posteriorly ; 

 metathorax subglobose, smooth, and shining, with scat- 

 tered erect hairs ; wings dusky along the externo and 

 transverso-medial nervures, and with a broad spot 

 covering the marginal, 2nd and 3rdsubmarginals and]iart 

 of the 3rd discoidal cell, 3rd submarginal larger than 

 2nd ; 5th segment of abdomen sparsely, and 6th densely 



TRANS. ENT. SOC. 1880. PART IV. (DEC.) 2 A 



