APID.E. 367 



of tte pubescence is uneven and ragged like that of agrorum, 

 of which I believe it to be an immature example. F. Smith 

 placed it in the British Museum collection under mus- 

 corum "immature." It certainly is not the species known 

 on the Continent as cognatus. 



B. agrorum, Fab. [muscorum. Smith, Saiind., cognatus 

 Step/i., fioralis, Kirb., BechwitheUus, Kirb., Francillonellus, 

 Kirb., Forsterellus, Kirb., Sowerbianus, Kirb., Curtisellus, 

 Kirb., agrorum, Kirb., agrorum. Smith). — Head clothed with 

 pale yellowish hairs intermixed with black, the proportions 

 that these differently coloured hairs bear to each other 

 varying greatly, face elongate, cheeks slightly longer than 

 their apical width, antenuEe in the ^ with the joints much 

 rounded posteriorly, their greatest width considerably more 

 than half their length ; thorax densely clothed above with 

 bright tawny yellow hairs, intermixed on the disk, in some 

 dark varieties with black, sides and beneath with pale 

 yellowish hairs ; abdomen clothed with tawny yellow haira 

 mixed or unmixed with black hairs, nearly every variation 

 from yellow to black may be met with, the black hairs 

 sometimes forming transverse bands, sometimes only lateral 

 spots, beneath clothed with pale hairs, sixth ventral seg- 

 ment in the c? with a slight transverse apical callosity, apex 

 of the sixth ventral segment in the ? with a distinct longi- 

 tudinal carina. S armature with the lacinia terminating in 

 a sharp, somewhat falcate spine-like process, and bearing 

 another sharp projecting spine near its union with the 

 stipes, and a third spine on its ventral margin which is 

 almost hidden by the wide plate of the lacinia, sagittte not 

 hamate at the apex ; legs clothed with black and pale hairs 

 intermixed. 



L. 10-18 mm. 



Common and generally distributed, a surface builder. I 

 have followed the Continental authors in adopting the 

 name agrorum for this species, as it does not seem certain 

 what species was described by Linuceus under the name 



