new or little known British Ilijmenoptera. 113 



The furrows of the mesonotum agree with Dahlbom's 

 figure of O. fonscolomhei, while it has also the peculiar 

 hyaline membrane in front of the scutcllum and the fur- 

 rowed hind tibia3 characteristic of the genus. 



Length 2 lines ; alar. exp. 3| lines. 



All the European species of this genus have the scu- 

 tellum and more or less of the thorax, with the legs, 

 reddish. It is true that the amount of the red colora- 

 tion on these parts varies, but so far as I can make out 

 from the descriptions, the thoi'ax and the legs are never 

 black together, nor is the red ever entirely absent, al- 

 though it may vary from sanguineous to brown. 



If Dahlbom's figiu'e (pi. 1, f. 8) of Onychia fonsco- 

 lomhei be correct, then there is a considerable difference 

 in shape between it and our insect. In fonscolomhei the 

 metathorax is longer and not so high, Avhereas in nigripes 

 it is straighter. The last joint of the antennas in fonsco- 

 lomhei is represented as being not much longer than the 

 preceding, but this of course may be a mistake on the 

 pai-t of the artist. 



Onychia riigosvs, Htg. (considered by Reinhard to be 

 a variety of O. Westwoodi, Dbm.), has the thorax all 

 black, but then the legs ai'e red. 



The only specimen of nigripes I have seen was taken 

 by Mr. J. B. Bridgman at Norwich. It is a female. 



Allotria. 

 Allotria pleuralis, sp. n. 



Antennre a little shorter than the body, the apical half 

 somewhat thicker than the basal ; the first four or five 

 joints pale yellow, the others black or rather dark fuscous. 

 Head pale red, the vertex very slightly darker. Thorax : 

 pronotum, mesonotum and the base of metanotum black ; 

 the pleurjB, sternum and apex of metanotum dark red. 

 Abdomen black, reddish at the base above, and the basal 

 half of the sides is more or less dark fuscous red. Legs 

 pale yellow. Wings clear hyaline, nervures very pale 

 testaceous ; radial cellule small, scarcely longer than 

 broad. 



Length a little over ^ a line ; alar. cxp. 1^ lines. 



This little species comes near to A. longipcnnis, Htg., 

 but that has the whole of the antennse and only the pro- 



TRANS. ENT. SOC. 1879. — PART I. (APR.) I 



