204 Mr. E. Saunders' Sijiw2)sis of British 



(2) 1. Head more or less emarginute posteriorly . . exsccta. 

 (1) 'i. Head not emarginate posteriorly. 



(4) 3. Clypeus emarginate . . . . . . . . sanijuinea. 



(3) 4. Clypsus not emarginate. 

 (8) 5. Frontal area polished.. 



(7) (i. Eyes not hairy in J and ^ , sparsely so in ^ , 

 which has the hody with only a few scattered 

 hairs . . . . . . , . . . . . rufa. 



(6) 7. Eyes hairy in J and ^ , densely so in J* , which 



has the body covered with upright hairs . . congercns. 



(5) 8. Frontal area dull. 



(10) 9. Abdomen shining, without a silky pubescence . . gagates. 

 {!)) 10. Abdomen Avith a silky pubescence. 



(12) 11. ^ body without metallic tinge; J body closely 



punctured; § tliorax more or less red .. cunicularia. 



(11) 12. (^ body with a metallic tinge; J body with 



scattered punctures ; ^ thorax not reddish 



at all . . . . . . . . . . . . fusca. 



1. rufa, Linn. Syst. Nat. ed. x. 1, p. 580, No. 2. Fig. 

 Smith Cat. Brit. Foss. Hym. pi. i. fig. 1, 2, 3, &c. 



(? black-brown ; legs and genital segments testa- 

 ceous ; base of femora, tibiae, and tarsi sometimes darker ; 

 head, prothorax and mesothorax, and sides of metathorax, 

 dull ; the rest more or less shining. Head and thorax 

 covered with fine semi-erect hairs. Mandibles not 

 toothed ; eyes with scattered hairs. Abdomen widest at 

 the base, somewhat egg-shaped, surface very indistinctly 

 and somewhat rugosely punctured, with a few hairs on 

 the basal and apical segments. Wings clouded with 

 brown at the base ; nerves brown. Length 10 — 12 mill. 



? brown : head, with the exception of the vertex 

 and a central stripe, prothorax, metathorax, and some- 

 times sides of mesothorax, petiole, and extreme base of 

 abdomen and legs testaceous-red. Head and thorax dull ; 

 wings slightly clouded at the base ; scutellum and abdo- 

 men polished and shining. Eyes not hairy. Apical 

 segment of the abdomen and the under side with some- 

 what long hairs. Length 10 mill. 



^ entirely dull, except the frontal area and parts 

 of the mouth ; head widest behind the eyes ; not exca- 

 vated or constricted posteriorly ; red, with a brownish 

 spot covering the vertex, and extending widely between 

 the eyes to the insertion of the antennae ; clypeus not 

 emarginate, with a dark central line ; antennae brown ; 

 thorax with only a few scattered bristly hairs, red, more 

 or less clouded on the pro- and mesothorax. Abdomen 



