3 12 ENTOMOLOGICAL NEWS. [J u ty '9 



the front near the eyes and not quite in line with the fronto- 

 orbitals. They are not of frequent occurrence. 



Gena, or parafacial, that part of the side of the face which 

 is above the transverse impression and bounded on the sides by 

 the arm of the frontal suture and the anterior border of the eye 

 respectively. 



Genovertical plate, the continuation of the gena upward ex- 

 tending to the vertex. 



Inner vertical bristles, the inner pair of 4 bristles inserted on 

 the vertex more or less behind the upper and inner corner of 

 the eye, erect or convergent ; usually the larger of the 2 pairs. 



Lateral facial bristles, one or 2 bristles sometimes present 

 on the sides of the face below, toward the eye. 



Lunula, see frontal lunule. 



Mesofacial plate, that portion of the face enclosed by the 

 frontal suture and th^ vibrissal ridges in which are found the 

 antennal foveae. 



Metacephalon, the segmented post oral portion of the head. 



Occiput, that portion of the head in the rear of the cheeks 

 and eyes, upon the lower part of which is borne the beard. 



Occipito-central bristles, a pair of bristles on the upper part 

 of the occiput, just below and almost in line with, the inner 

 vertical pair. 



Occipito-lateral bristles, a pair of bristles borne one on each 

 side a little back of, below and toward the outside of the outer 

 vertical bristles. 



Ocellar bristles, lesser. From 3 to 12 pairs, usually insert- 

 ed in two parallel lines, sometimes in 4, which begin very close 

 to the insertion of the greater ocellar bristles and extend back- 

 ward a variable distance. 



Ocellar bristles, ocellar pair, greater ocellars, etc., on the 

 ocellar triangle just back of the foremost ocellus; they are al- 

 ways diverging and pointing forward. 



Ocellar plate, or ocellar triangle. A triangle, indicated by 

 grooves or depressions, on which the ocelli are situated. 



Ocelli, or simple eyes, on the upper part of the front in the 

 middle, between or a little back of the compound eyes, usually 

 3 simple eye lenses, present in most diptera. 



