Asilidae. 37 



by the faet that in this case the lower forceps would seem homo- 

 logous with the upper forceps in other genera and vice versa with 

 regard to ttie other forceps; I vvas therefore somewhat in doiibt til! I 

 examined a quite mature pupa, and here the large forceps vvas lying 

 dorsally thus proving beyond doubt that this is the upper forceps. It 

 seems to me very curious that the forceps seem thus always to be 

 turned upside down; (yet similar cases are found e. g. among the An- 

 thracids.) — In the female the eighth ventral segment is excised in 

 the hind margin and from the excision projects a short, compressed, 

 somewhat knife-shaped ovipositor which quite fills out the excision 

 and stretches a Httle beyond the hind margin of the segment; at the 

 end of the eighth dorsal segment hes a semiannular piece, beset at the 

 hind margin with spines which stretch out of the eighth segment above 

 the ovipositor; ventrally to this piece there lies a small chitinous fork, 

 but this is quite hidden and only to be seen by preparation. The legs 

 are somewhat strong, the femora have long hairs below, and the tibiæ, 

 especially the anterior, are long haired on tiie ventral side, among 

 the hairs there are some long, thin bristles; there are some strenger 

 bristles on the anterior side of the hind femora and apically on the 

 anterior side of the middle femora, and similar but longer bristles are 

 found on the tibiæ, on the front tibiæ especially on the posterior side. 

 All tibiæ have apical spurs. The tarsi have long bristles at the apex 

 of the joints. The front tibiæ have a dense pubescence on the ven- 

 tral side over nearly the whole length, the hind tibiæ have a similar 

 pubescence just at the apex. The tarsi are densely pubescent below. 

 The claws are long; there are two pulvilli and a long, bristle-shaped 



Fig. 19. Wing of L. cinctus. 



or nearly claw-shaped empodium. Wings with the subcostal cell 

 open, the cubital vein forked; between the discai cell and the upper 

 branch of the postical vein a postical cross-vein ; five posterior cells, 

 the fourth narrowed at the margin ; the anal cell closed slightly before 

 the margin. 



The larval and pupal stages have, so far as I am aware, not 

 been described hitherto. The larva (L. cinctus) is cylindrical, yellowish 

 white, fmely striated longitudinally; it is about 11 mm, long and 1,6 mm. 



