July, '09] ENTOMOLOGICAL NEWS. 3! I 



Facial carina, a keel or projection lying between the an- 

 tennae, on the median line of the face, present in some Calyp- 

 terae. 



Facio-orbital bristles, borne on that portion of the face lying 

 below the base of the antennae and limited below by the trans- 

 verse impression. 



Foramen, great or central. The opening in the center of the 

 occiput at the back of the head; into which is inserted the neck. 



Front, the space between the eyes in dichoptic flies ; limited 

 by the upper margin of the head and a line drawn through the 

 root of the antennae. 



Frontal bristles, ascending. The uppermost of the frontal 

 bristles from I to 4 in number. 



Frontalia or Frontal vitta, that portion of the front bound- 

 ed by the ocelli, the root of the antennae and the genovertical 

 plates or parafrontals. 



Frontal bristles, a row on either side of the median vitta 

 descending to or often below the root of the antennae, on the 

 side of the face anteriorly; of much use in the classification of 

 the Calypterae. 



Frontal lunule, an oval or crescentic space just above the 

 root of the antennae in Cyclorraphous flies, bounded by the 

 frontal suture. 



Frontal suture, ptilinal suture or frontal fissure. A suture 

 having the general shape of an inverted U, the arms of which 

 make with each other more or less of an angle. It occupies 

 the center of the muscoidean face and it is through this suture, 

 just above the root of the antennae, that the ptilinum is thrust 

 in forcing the cap from the pupa shell. 



Frontal triangle, the triangle between the eyes and the root 

 of the antennae, the apex of which is above. Sometimes the 

 term is applied to a triangle indicated by color or depression 

 in the dichoptic front. 



Fronto-orbital bristles, a bristle or bristles on each side of 

 the front near the orbit, immediately below the vertical bris- 

 tles ; there may be i, 2 or none on each side. 



Fronto-orbital bristles, lower. Situated on the lower part of. 



