PROTOPLASA. 317 



not longer than the head and proboscis taken together ; first joint 

 very short ; second stout, subglobular ; flagellum gradually- 

 attenuated ; its first joint is attenuated at the basis, a little 

 longer than broad ; the following two or three joints are short, 

 square ; the next ones are somewhat more oval, elongated ; the 

 flagellum is clothed with moderately long hairs. Collare extended 

 into a long neck ; thoracic suture (as far as I can perceive on my 

 specimens) deeply sinuate ; scutellum large, very much projecting ; 

 metathorax usually small. Abdomen rather short, stout. Feet 

 moderately long and stout ; tibiae armed at the tip with moder- 

 ately long, strong, divaricate spurs ; empodia indistinct ; ungues 

 smooth. 1 Wings (Fig. 7) broad, with a very projecting, square 

 anal angle ; the venation 



is very peculiar ; auxiliary Fig. 7. 



vein comparatively short, 

 reaching but little beyond 

 the middle of the wing ; sub- 

 costal cross-vein at its tip ; 

 the first longitudinal vein 



reaches far beyond the auxiliary vein ; there is no marginal cross- 

 vein, and hardly any vestige of a stigma ; the origin of the praefurca 

 is unusually near the basis of the wing ; it has a conspicuous stump 

 of a vein on its curvature ; the first submarginal cell is less than 

 half so long as the second ; the first posterior cell is a little 

 shorter than the second submarginal ; it is divided longitudinally 

 in two halves by a supernumerary vein, which starts from the 

 middle of the small cross-vein and runs parallel to the two ad- 

 joining longitudinal veins ; discal cell very long, in the shape of 

 a narrow triangle, truncate at the tip ; its inner end, as well as 

 the inner ends of the two last posterior cells are somewhat anterior 

 to the inner end of the first posterior cell ; the penultimate pos- 

 terior cell is formed by the last branch of the fourth vein (or the 

 posterior intercalary vein, comp. p. 34), which, in this case, issues 

 close by the inner end of the discal cell ; this penultimate posterior 

 cell has a supernumerary cross-vein in its middle ; the fifth vein 

 is somewhat angular, the sixth nearly straight ; the spurious cell 

 is very large, triangular ; in consequence of the great length of 



1 The two last statements are repeated from Proc. Acad. Nat. Set. Philad. 

 1859 ; I cannot well verify them now, as there is only a single foot left. 



