248 JAMES WATEESTON. 



Head (fig. 4 h) as wide as deep ; eyes descending two-thirds towards the clypeal edge^ 

 which is one-seventh of the width of the head, with the inner orbits siibparallel to 

 about one-half. The shortest distance across the frons at one-third down is one-half 

 that at the lateral ocelli, where the breadth is one-sixth of the width of the head, and 

 on the base line approximately three-fourths ; the eyes, however, are so gradually 

 rounded ofE below that the last measurement is difficult to determine. The toruU 

 are extremely far down and far apart, practically at the corners of the mouth-edge, 

 and nearly flanking the clypeus itself ; at their widest they are separated by nearly 

 three times (11 : 32) the straight clypeal edge. Whereas in C. ajer the thickened 

 raised reticulation extends round the orbits to the lowest point and almost to the 

 same level across the lower frons, in the present species such a refringent sculpture is 

 found only on the vertex and to the length of its own diameter in front of the anterior 

 ocellus. The face is nearly smooth, with a slightly raised reticulation mid- way between 

 the toruli and the base of the eyes, the lower orbits, however, being quite smooth ; 

 the orbital bristles (13-15) on each side below the ocellus are well developed. Along 

 the mid line, between and a little above the toruli, are 5-6 pairs of bristles, with 3-4 

 between the lowermost pair of each row and the torulus ; 3 stouter bristles above the 

 clypeal edge, and 2-3 between each corner and the torulus ; the face is otherwise 

 bare ; towards and on the genae the surface becomes striate reticulate, with one or 

 two bristles. 



Mouth-parts : labrum minute, concave, 5 (?)-7 (?) bristles, the middle pair longest ; 

 mandibles (4 : 3) distinctly tridentate, somewhat narrow apically, the middle tooth 

 more prominent and broad, the uppermost nearly rectangular, 1-2 bristles on the 

 stipes ; joints of the maxillary palpus, 5:3:4:6; the first joint about twice, the 

 fourth two and a half times as long as broad. 



Antennae (fig. 5 b) : length, -68 mm. Scape (5 : 1) just longer than the club, or 

 two and a half times as long as the pedicel, or just shorter than the pedicel and first 

 four funicular joints ; pedicel, 5:2; funicle : first joint just longer than broad, 

 the others transverse ; last funicular not quite half as broad again as the first ; 

 club much wider than either the last joint of the funicle (5 : 3) or the first (3 : 1). 

 On the scape there are a few subdorsal bristles on both sides, and on the inside a 

 ventral row (9-10) ; the bristles of the pedicel and funicle are rather long and stiff. 

 Few sensoria, and only on the last two funicular joints and on the club segments, as 

 foUows :— 5th, 1-2 ; 6th, 4-5 ; («) 6-7 ; (6) 7-8 ; (c) 6. 



Thorax : pronotum coarsely raised reticulate on the posterior half, the surface 

 smooth anteriorly ; 18-20 bristles in the post-median row, rising well in advance of 

 the hind margin ; no spiracular emargination. Mesonotum : there are three t}'pes 

 of sculpture here, {a) anteriorly a narrow refringent area, cells thick-walled, raised ; 

 (6) a broader belt of longitudinally drawn out, closely aggregated, setigerous cells, the 

 bristles being short and for the most part appressed ; and (c) before the scutellum a 

 nearly smooth band, with a normal fine shghtly raised reticulation, with 4 dense 

 bristles (2 : 2) of which the middle pair are longer. The suture is obtusely angled 

 over the axillae, which bear 3 bristles each ; the scutellar tuft of heavy bristles is 

 dense, and there are besides 5-6 normal bristles on each side of the mid line. The 

 pattern of the axillae and scutellum is uniformly raised and thickened, coarser on the 

 scutellum ; mesopleurae very finely striate. 



