ORTALIDJE — SYSTEMATIC DISTRIBUTION. 57 



Tephronota begins the scries of those genera, the third antennal 

 joint of which is not rounded at the tip, but ends above in a sharp 

 corner. It contains small species which, in the shape of their 

 body, and especially in the structure of the head, remind of the 

 Pteropaectrise very much, liut they can always be distinguished 

 by their thorax, which is thickly covered with a gray pollen, even 

 should the third antennal joint, in drying, have lost the sharpness 

 of its upper corner. The picture of the wings consists either of 

 complete crossbands, or of spots and half-bands, or even of spots 

 only. 



Typical species : gyrans Lw. 



11. Ceroxys Macq. 



Charact. — Third autennal joint distinctly excised on its upper side. 



Thorax upon its middle beset with bristles as far as its anterior 

 portion. 



First longitudinal vein bristly upon its end only; fourth longi- 

 tudinal vein not bent forward ; the posterior angle of the anal cell 

 not drawn out in a lobe. 



Yellowish-gray or cinereous-gray species, with a thorax with- 

 out stripes, and with wings having large dark spots ; the arista 

 is always distinctly pubescent. 



Typical species: crassipermis Fab. 



12. Hypociira Lw. 



Charact. — Third antennal joint distinctly excised on its upper sieid. 



Thorax, upon its middle, not bristly in front of the region of the 

 suture. 



First longitudinal vein with bristles upon its end only; fourth 

 longitudinal vein not bent forward; posterior angle of the anal cell 

 not drawn out in a lobe. 



Small, grayish-white species, with a very limited picture of 

 the wings, generally consisting of a very narrow border of the 

 crossveins. 



Typical species: albipennis Lw. 



18. Anacampta Lw. 

 Charact. — Third antennal joint distinctly excised upon its upper side. 



Thorax, upon its middle, not bristly in front of the region of the 

 suture. 



