244 Mr. E. Saunders' Synojms of 



segment with an apical band of paler hairs, although in 

 the bright varieties the pubescence is much less abundant. 

 Apical fimbria brown-black ; apical dorsal valve strongly 

 and closely punctured, its margins slightly reflexed ; 

 segments beneath clothed with short black hairs, and 

 fringed with long pale apical hairs. Legs clothed 

 with black-brown hairs; scopae pale beneath. Length 

 10 — 15 mm. 



Hah. Var. Trimmerana very common in the spring, 

 April, &c., and generally distributed. Var. Sjnnigera 

 rare ; it has occurred, however, at Eeigate, Canterbury, 

 Ventnor, Exeter, Highgate, Tunbridge Wells, Hastings, 

 E slier, Barham, &c. 



Of this species there are certainly two distinct races, 

 Trimmerana true and spinigera, and hitherto they have 

 always been considered as species. Prof. Perez, however, 

 considers them as only varieties, and I have quite come 

 to the conclusion that he is right — the length of the 

 spine on the cheek of the ^ varies exceedingly, from a 

 mere angular projection to a spine of one-tenth of an 

 inch long. Last spring my brother sent me a lot of 

 specimens from Canterbury ; there were amongst them 

 many ? Trimmerana, several ^ sjnnigera, and two $ 

 spinigera, but no ^ Trimmerana ; all these were caught 

 off the same sallow. At Ventnor, in 1880, 1 took several 

 (? spinigera, but no ? , only ? Trimmerana. Here on 

 Wandsworth Common I find $ and ? Trimmerana 

 abundant. These facts are not, I know, conclusive, but 

 the want of any structural character by which to dis- 

 tinguish the females of the two varieties apart, is, I think, 

 a strong argument in favour of there being but one species, 

 with a dimorphic c? . F. Smith used to consider only the 

 highly coloured females as spinigera ; but I have inter- 

 mediate varieties between them and the ordinary 

 Trimmerana which, I think, no one could refer with 

 certainty to either. 



Pieicornis is only a stylopized form of the above, and 

 I believe I am right in referring _/)/cij)('s also to it. 



11. Andrena cineraria, Linn. 



Linn., Syst. Nat., ed. x., vol. i., p. 575 ; Smith, Cat. 

 Brit. Hym., 2nd ed., p. 33. 



Blue -black ; pubescence grey ; scopae of ? black ; 

 wings with an apical cloud. 



