Heterogyna and Fossorial Hyincnoptcra. 237 



9. Wesmaeli, Thorns. Op. Ent. p. 221. Hym. Scand. 



iii. p. 149. Fig. Ent. Mo. Mag. xvii. p. 98. 

 Very like gihhus, but easily distinguished by the 

 slightly carinated ventral anal plate of the ^ , which 

 has near its apex a long pendant spine ; the ? is more 

 difficult to recognise, but has the apical segment beneath 

 somewhat compressed and carinated. 



Hah. — Chobham Common; rare. 



10. minutulns, Dalilbm. Dispos. 1842, p. 10. Fig. 

 Ent. Mo. Mag. xvii. p. 97 = rcllnlaris, Thoms. 



Black, the two basal segments of the abdomen and the 

 base of the third red ; the apex of the 2nd segment in 

 the (? more or less fuscous ; face below the antennas, 

 sides of the thorax, the metathorax, and the cox?e, 

 covered with silvery pubescence ; prothorax sharply 

 emarginate posteriorly ; wings with a broad fuscous 

 apical band, 3rd submarginal cell triangular ; <? with 

 the posterior tibiae sinuate on the side towards the 

 body, and incrassated at the apex ; $ with the anterior 

 tarsi simply spinose, not pectinated as in most of the 

 species. 



Closely allied to spissus, but differing in the shape of 

 the tibiae in the $ , and the triangular 3rd submarginal 

 cell in the ? . 



Length 8 — 9 mill. 



Hah. — Chobham Common. 



11. spissus, Schiodte. Kroyer's Tidskr. i. p. 336. 



<? differs from gihhus <? in having the 3rd sub- 

 marginal cell more quadrate and generally as large 

 or larger than the 2nd ; the apex of the wings with a 

 well-defined dark band ; abdomen broader and somewhat 

 oval, apical segment beneath compressed and spinosely 

 hairy at the extremity, 6th segment deeply emarginate, 

 the sides of the emargination bisinuate, 5tli segment 

 slightly emarginate at the apex. Length 8 mill. 



2 differs from gihhus, &c., in having the prothorax 

 destitute of hairs and the anterior tarsi without long 

 spines, as in its allies, but only with short ones like 

 the 2 of niger ; wdngs with a well-defined dark apical 

 band, the 3rd submarginal cell large as in the $ . 

 Length 9—10 mill. 



