TOXORRIIINA. Ill 



hardly perceptible ; the last joint of the tarsi of the male shows 

 on the under side, at the basis, the excision characterizing the 

 male sex in many genera. The tibiae have no spurs at the tip, 

 and the empodia are imperceptible. 



The wings (Tab. I, fig. 6, wing of T. magna) are rather short 

 for the size of the body, and not broad. 



The first longitudinal vein is short and joins the costa very 

 early and very soon beyond the origin of the second longitudinal 

 vein ; the mode of this junction of the first vein with the costa 

 is also peculiar ; instead of running parallel to the costa and then 

 taking a sudden turn towards it (as in most Tipulidse brevipdlpi), 

 the first vein gradually converges towards the costa and finally 

 coalesces with it, so that, beyond their junction, the costa becomes 

 much stouter. The auxiliary vein is very closely approximated 

 to the first longitudinal and ends in the costa almost opposite the 

 origin of the second vein ; the subcostal cross- vein is not far from 

 its tip ; there is no vestige of a marginal cross-vein. There is 

 no submarginal cell, as the second longitudinal vein does not 

 emit any other vein ; the first posterior cell follows immediately 

 after the marginal cell. The fourth vein starts, as usual, from 

 the fifth, very near the basis of the wing, being slightly arcuated 

 at its origin, and connected at this place with the first vein by a 

 small, but very distinct cross-vein. A thickening of the alar 

 membrane almost always exists at this place in the Tipulidse; 

 sometimes it assumes the appearance of a vein ; in the present 

 case, however, this cross-vein is particularly distinct, because the 

 origin of the fourth vein is a little more distant than usual from 

 the basis of the wing. Of the two branches of the fourth vein, 

 the posterior one is forked, and a cross-vein between this fork 

 and the anterior branch closes the discal cell. 



The sixth vein is very closely approximated to the fifth for more 

 than one-third of its course, and then suddenly diverges at an 

 acute angle from it ; in some specimens the basal portions of these 

 veins are so near each other as to appear coalescent ; a careful 

 examination, however, proves that they run alongside of each 

 other. The seventh vein is nearly straight. 



The forceps of the male, as far as its structure can be ascer- 

 tained on a dry specimen, seems to be somewhat like that of 

 Elephantomyia, that is, it consists of a pair of subcylindrical 

 basal pieces, to which two pairs of ensiform, horny appendages 



