»i^4 APIS. (**. c. 2. I) 



and that the former is constantly furnished with 

 an aculeus, while the latter has no such instru^ 

 ment, but only the male organs : these reasons 

 have induced me to consider them as different 

 sexes of the same species. 



Panzer's u4. fronticornis is evidently nothing 

 more than the aculeate of our v/. hicornis, which 

 agrees with the authentic specimen in the Linnean 

 cabinet. His description appears to have been 

 drawn from an insect that had bfeen long dis- 

 closed, for in such the hair that covers the upper 

 side of the abdomen fades to cinereous, and that 

 upon the venter becomes paler than in more re- 

 cent specimens. Linneus has described the ab- 

 domen by the term " rufum," which, in fact, be- 

 longs only to the hirsuties that covers it, as the 

 abdomen itself is nigro-aeneous in both sexes; this 

 circumstance probably might lead Panzer, whose 

 specimen, as I have just observed, was probably an 

 old one, to look upon his insect as distinct from 

 A. hicornis. The figure which Christius has given 

 of the aculeate is far from a good representation 

 of it, and his fig. 10. which he calls the other sex, 

 appears to be a distinct species ; it is certainly not 

 ui, rufa. That which he afterwards figures for 

 A. rufa is a very different insect {a) : his A. pu- 

 silla (Z) comes very near to it, and I should refer 

 to it as such if the antennae were not so short in 



(ff) Vid. supra, p. 47, {h) Hymenopt. p. 161, tab. 



n. fig, 14, 



his 



