Hcterogi/na and Fossorial Ilymcnnptera. 283 



with erect hairs, the posterior and intermediate tibiaj 

 black at the apex, not red as in tibialis, their interior 

 margin almost without spines. 

 Length 6 — 7 mill. 



Hah. — Generally distributed. May be bred from per- 

 forated bramble sticks. 



3. capitosKs, Shuck. Foss. Hym. p. 159. 



Black ; the anterior tibia3 in front, the anterior and 

 intermediate tarsi, and the extreme base of the posterior 

 tibia3 whitish. Head and thorax finely and remotely 

 jDunctured ; metathorax with a transverse crenate line at 

 its extreme base, otherwise smooth and rounded, slightly 

 wrinkled posteriorly at the sides, and with a longi- 

 tudinal channel near the apex ; abdomen shining, widened 

 towards the apex ; apical segment in the ? with a sharp 

 carina on each side, and impressed at the apex, covered 

 with long erect hairs ; apical segment in the <? shining, 

 scarcely punctured ; posterior tibiae very clavate in both 

 sexes, without spines. 



Length 8 mill. 



Hah. — London district, Chobham, Keigate, Tunbridge 

 Wells, Dorsetshire, Yorkshire. Rare. 



4. leucostoma, Linn. Syst. Nat. ed. x. vol. i. p. 571. 



Black, shining, with the calcaria pale, as well as 

 the base of the posterior tarsi in the ? . Head widely 

 channelled between the eyes, finely and remotely punc- 

 tured, with erect hairs on the vertex ; clypeus covered 

 with bright silvery hairs ; thorax very finely and irregu- 

 larly punctured ; metathorax smooth and shining at the 

 base, with a deep central sulcature in the ? , a shallow 

 one in the 3 ; sides of the metathorax dull, punctured, 

 and finely pubescent, but not separated from the shining 

 basal area by any distinct impressed line or sulcature ; 

 wings slightly brownish ; abdomen shining, nearly im- 

 punctate, regularly ovate in the ? , its widest part being 

 about the apex of the 3rd segment ; elongate in the <? ; 

 apical segment. in the ? acuminate, with a sharp carina 

 on each side, and a slightly raised central ridge, the 

 extreme apex piceous ; tibiae of the posterior legs irregu- 

 larly spinose. 



Length 6—10 mill. 



TRANS. ]':nt. soc. 188U. — PART IV. (dkc.) 'I V 



