126 KANSAS UNIVERSITY SCIENCE BULLETIN. 



wide and 0.62 mm. long. Its posterior edge is concave, as are 

 also the lateral edges which border on the compound eyes, 

 while the anterior margin is quite convex and has a somewhat 

 more than semicircular excision at its median point, in which 

 region is located the frontal ocellus, seen in figures 4 and 5, fo, 

 and in 2 in longitudinal section, pi. 28. The epicranium is 

 seen to be flat in surface when the head is viewed in profile. 

 The other two ocelli (25-4, o) are placed at the two posterior 

 angles of the epicranium, near its margin and slightly posterior 

 to the compound eyes. They are about 0.07 mm. in diameter. 

 The epicranium is divided along its median line by a very 

 plainly cut suture into two equal sclerites. This suture is deep, 

 and in making dissections of the head these two sclerites were 

 often separated readily along this line. The anterior, convex 

 suture between the epicranium and the rest of the head was 

 not so apparent in most specimens that I examined, though 

 usually those boiled thoroughly in potassium hydrate and then 

 carefully cleared in xylol showed it more plainly. The surface 

 of the epicranium is rugose-punctate, slightly pubescent. 



The frontal cones, erroneously called "cones of the clypeus" 

 by Slingerland and "face lobes" by Scott,' are found, one on 

 each side of the median line, below the epicranium {28A, fc). 

 As seen from the front (28-5) they diverge from the vertex 

 just beyond the front ocellus. They are separated from the 

 cheeks or gense by a curved suture, which appears somewhat 

 ovate when the cones are viewed from below. This suture 

 could be made out much more easily on the cephalic than caudal 

 surface of the head. 



The gense (28-1, 4:,5,g) extend from the cephalic edge of the 

 epicranium down on each side under the compound eyes and 

 fuse with the caudal, folded portion of the epicranium. Be- 

 tween the cones and the compound eyes is the antennal socket 

 (fig. 5, as), which is quadrate in shape, with angles much 

 rounded, and with a blunt projection, p, breaking into it on its 

 caudal edge, which is concerned with the articulation of the 

 basal segment of the antenna. The aperture filled by the 

 prosternum, procoxse, frons and mouth parts is similar in 

 shape to that of the epicranium but narrower. On the edge 

 of the gena, midway between the vertex and the compound 

 eye on each side, is situated a sharp projection (figs. 1 and 



1, Insect Life, vol, V, pp. 229-230, 



