3 10 ENTOMOLOGICAL NEWS. [J"ly> '09 



logically speaking, it is the rudiment of the terminal antennal 

 joints, to be found in the lower groups of Orthorrapha. Pri- 

 marily functional as a tactile sensory organ. 



Beard, pilosity arising and depending from the lower por- 

 tion of the occiput. 



Bucca, that part of the head and face below the transverse 

 impression, under the eye, extending downward to the edge 

 of the mouth opening upward along the outside of the facialia 

 and continuing backward to the great foramen. 



Cheeks, the space between the lower border of the eye and 

 oral margin, merging into face at front and limited by the occi- 

 pital margin behind. This term is not exactly synonymous 

 with the Buccae of Hough, which see. 



Clypeus, a part of the mouth structure, often visible below 

 the margin of the mouth in front as a more or less visor-shaped 

 piece. 



Cruciate bristles, a pair in the middle of the lower part of the 

 front, directed inwardly and forwardly; observed in some 

 Calypterae and Acalypterae. 



HEAD. 



Epistoma, the oral margin and an indefinite space immedi- 

 ately contiguous thereto; not often now used. 



Eyes (compound), placed on the sides of the head and com- 

 posed of many simple eyes they may be bare (glabrous), or 

 pubescent. 



Eye, occipital margin of. That edge of the compound eye 

 bordering upon the posterior orbit and occiput. 



Face, that area of the head bounded by the base of the an- 

 tennae, the oral margin, eyes and cheeks. 



Facial depression, see Antennal foveae. 



Face, transverse impression of. See transverse impression. 



Facial bristles, inserted in a series on each side of the mid- 

 dle portion of the face, above the vibrissae along the facialia; 

 especially conspicuous in Tachinidae. 



Facialia, two distinct ridges inside the arms of the frontal 

 suture, constituting the lateral boundaries of the facial depres- 

 sion. 



