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JAMES WATERSTON. 



and broad, the middle one most prominent. In the maxillary palpus (20, 17, 15, 36) 

 the fourth joint (3 : 1) is rather long. On the galea are, in all, about 40 external 

 bristles, 15-16, apically stronger (in coelojys nearly 60, in ohscuratus upwards of 

 70 bristles). 



Thorax. Pro- and meso-nota up to the suture regularly, rather finely transverse 

 reticulate — the cells hardly raised. Mesonotum with about 100 bristles, which 

 increase in size and are sparser towards the suture. The axillae (10 bristles), the 

 mid-anterior half and a small pre-apical spot on the scutellum still with a fine 

 reticulation, but the cell-walls much raised and refringent. Especially posteriorly, 

 the cells on each side run together into long, thin ridges (about 12 deep) whose 

 optical effect is a beautiful silky lustre. There are about 24 (12, 12) short bristles 

 on the anterior half of the scutellum and about half that number widely spaced 

 towards the apex where there are placed two approximated median bristles. 

 Mesosternum medianly with a fine, raised pattern ; pleurae smooth, with an 

 extremely fine, close striation, a little coarser posteriorly. 



Wings. Fore wings, length 1-4 mm., breadth -56 mm., 2\ times as long as broad, 

 a little narrower than in ohscuratus. The submarginal vein is very long, over 8 

 times the marginal, and about 5 times the slender radius. Marginal : radius : post- 

 marginal, in the ratio 8 : 14 : 5. The postmarginal is thus a little longer relatively 

 than in ohscuratus, and the angle it makes with the radius is more acute than in 

 either ohscuratus or coelops. The submarginal vein mth 12 bristles (18 in 

 ohscuratus) ; the 4 long apical inferior bristles on the submarginal cell are all 

 closer set, otherwise the chaetotaxy round the marginal, etc., closely agrees with 

 that of ohscuratus, except that in the latter species there are more bristles beyond 

 the radius (fig. 1). Behind the submarginal vein is a complete row of short 

 bristles, mainly coloured (2-3 beyond the middle of the submarginal, hyaline) ; 

 behind this row again is an incomplete row of 4-5 bristles (in ohscuratus about 3 

 complete rows), thence to the hind edge of the wing bare (about a dozen hyaline 

 bristles in ohscuratus). On the edge of the patch of bristles below the marginal 

 and uprise of the submarginal proximally and posteriorly are about 20 weak 

 hyaline bristles (70-80 in ohscuratus). Hind wings narrow, length -93 mm., 

 breadth .26 mm., about 3^ times as long as broad (3 in ohscuratus and coelojys) ; 

 9 minute bristles in submarginal cell and 6-7 at the hooks. 



Legs. Fore-legs with coxa slightly narrower than in C. ohscuratus and bearing 

 posteriorly and subdorsally above the trochanter a patch of only 10 short bristles 

 (26-28 in coelops and ohscuratus). In the tarsus the first joint is longer than the 

 fifth (7 : 6). In the mid legs the tibia bears anteriorly on the apical edge 8 peg-like 

 spines, and there are on' the first four tarsal joints respectively 19, 10, 10, 7, similar 

 spines (in ohscuratus 32, 13, 12, 9-10). The tarsus is moderately bristly, .e.g, on 

 the posterior aspect of the first joint there are about 5 longitudinal rows of bristles 

 containing in all about 50, while 12-13 of the plantar bristles are spinose (in ohscuratus 

 about 70, and 15-16 ; in coelops about 30, and 12-13). In the hind leg the tibia 

 is distinctly narrower (70 : 9) than in coelojjs (57 : 9) or ohscuratus (65 : 10). The 

 comb contains 16-17 spines and 10 of the plantar spines (single or double) are 

 stronger (13-15 in coelops and ohscuratus). 



