2 THE ENTOMOLOGIST. 



typical specimens are preserved in the Linnean Society's col- 

 lection. I am quite satisfied, after a most careful examination 

 of the types, of their being the same species described under 

 the name of C. quadridentata in the ' Bees of Great Britain.' 



In Kirby's ' Monographia Apum Angliae' a species is 

 named "inermis ;" it was taken by Mr. Trimmer at Brent- 

 ford : the typical specimen is in the British Museum ; 1 have 

 carefully examined it, and can vouch for its being only an 

 injured example of C. simplex, a male, with the thorax 

 crushed, the scutellum being pressed down beneath the 

 plate of the metathorax, by which the spines that arm the 

 scutellum laterally are hidden ; a minute examination, how- 

 ever, enables any person to detect the teeth, which are 

 described as being wanting by Kirby. 



I have very carefully examined both the Kirbyan and 

 Fabrician typical specimens, the forfner being undoubtedly 

 those described in the ' Monographia, the latter placed in 

 the Banksian collection as representatives of Kirby's spe- 

 cies. An examination of Kirby's insects shows that his 

 Apis conica is the Ccelioxys simplex, male and female ; the 

 Apis inermis, as shown above, is referable to the same 

 species. The three Fabrician species, A. conica, A. tri- 

 dentata and A. quadridentata, are likewise all to be referred 

 to the C. simplex. Some doubt must attach to the authen- 

 ticity of the specimen of A. conica which is described in the 

 ' Entomologia Systematica' as having " scutello inermi," the 

 Banksian insect having the usual tooth on each side of the 

 margin of the scutellum : probably the specimen from which 

 the description was taken was, as suggested by Kirby, one of 

 the leaf-cutter bees. 



After a very careful examination of a long series of each 

 species, I have detected such constant and marked differences 

 as will, I think, render the separation of them a matter of 

 little, if any, difficulty ; I have also made a few drawings, in 

 the hope of assisting more than a mere description can pos- 

 sibly do. . 



1. Both sexes of Coelioxys quadridentata may be dis- 

 tinguished from all the other species by their having black 

 spines at the apex of the intermediate and posterior tibiae; 

 in all the others the spines (calcaria)) are more or less pale 

 ferruginous : this character alone would serve to separate 



