114 
Psyche 
[Sept -Dec. 
but gradually narrowed anteriorly, the inner margins strongly 
diverging anteriorly; frontal bristles many, in two or three 
irregular rows, crowded in a regular narrow strip near the 
inner margin and extending over the anterior three-fourths of 
the inner orbit; a fringe of long bristles at the edge of the outer 
orbit, near and behind the eye ; 6 or 7 very long vertical bristles 
in the upper corner of each inner orbit. Postvertex (vertical 
triangle) triangular with obtuse and somewhat ogival anterior 
angle and laterally produced side angles, the hind margin 
nearly straight; slightly shorter than mediovertex, flat, smooth, 
without rudimentary ocelli, pits or depressions. Fronto-clypeus 
long and broad, slightly shorter than its distance from the 
occipital margin, fused laterally with the base of the antenna; 
fronto-clypeal suture barely indicated; base of clypeus very 
broad and short, its antero-lateral arms short, separated by a 
broad but shallow inward curve; frons proper with a minute 
and shallow median pit close to the fronto-clypeal suture. 
Mediovertex well developed, much broader anteriorly, with 
wide antero-lateral extensions separating the gense from the 
fronto-clypeus. Eye of many facets, small, nearly elliptical, 
occupying a little over one-third of the upper side of the head, 
seen from above about twice as long as wide, about twice as far 
from the postvertex as from the fronto-clypeus. Palpi about as 
long as clypeus, but mostly retracted within the buccal cavity; 
only the short tips visible from above. Antenna large; first 
segment with a group of 3 to 6 long bristles in the inner anterior 
corner; appendage of second segment nearly twice as long as 
wide, flat, broadly rounded off at apex, densely covered with 
many long bristles; protruding arista of third segment (be- 
neath the appendage of the second) much flattened, elongate 
paddle-shaped. Ventrally, the latero-anterior areas of the head 
(corresponding to the parafacialia and facialia) bear many long 
bristles (vibrissse) in several rows, crowded along the inner 
(buccal) margin; the later o-pos ter ior areas (cheeks) bear two 
long setae on each side. Thorax wider before the wings than 
long from tip of humeral angle to base of abdomen; humeral 
margin very deeply, but broadly curved inward. Humeral 
callosity broad, flat, obtusely rounded off, separated by a shal- 
low inward curve from the more prominent prealar angle. Pro- 
mesonotal suture distinct, but in dorsal view visible only 
medially behind the occipital margin; scuto-scutellar suture 
