94 HYMENOPTERA. 



apart ; these observations on the localities of Kirby's species, 

 taken in conjunction with the fact of both being found in 

 some numbers on the same flower at Bournemouth, in 

 addition to their very close resemblancQ, satisfy me that A. 

 rufifari<i.<i is the female of A. iridentafa. In Mr. Kirby's 

 own interleaved copy of the " Monographia," I found a note 

 to the effect that A. 7-t(fiiai'sis was probably only a variety 

 of ^. fuscipes. This is certainly not the case ; both sexes of 

 the latter insect were extremely abundant at Bournemouth — 

 A. trklentata was taken near to Christchurch. 



The differences between the female of A. tridentata 

 and the female of A. puhescens, are the following: A. tri- 

 dentata ? is much more pubescent, the pubescence paler, 

 nearly covering the abdomen, not leaving a naked space be- 

 tween the fringe on the apical margins of the segments ; the 

 apical fimbria is pale golden and is tipped with fulvous in 

 the middle of its apical margin ; all the tarsi are pale rufo- 

 testaceous; the pubescncee which clothes the inner surface of 

 the basal joint of the posterior tarsi is pale fulvous ; this is 

 also the colour of that which clothes the disk of the thorax ; 

 the flagellum is pale rufo-testaceous beneath, excepting the 

 two basal joints, which are black. The female of A. puhes- 

 cens has only the two apical joints of the antennae pale ; the 

 anal fimbria is fuscous. Both sexes of A. pubescens frequent 

 the common heath (Calluna vulgaris), 



Andrena argentata. — This is a very local species, but 

 abundant at Bournemouth ; it was discovered about twenty 

 years ago at Hawley, Hants, and at Sandhurst, Berks ; a 

 year or two subsequent to which I found it at Weybridge ; 

 since that time I have not met with it until the last season ; 

 it frequents the Heath. 



