522 



DIPTERA — APIIANIPTERA 



Insects looking as if the iipper were the under surface. They 

 are wingless, with a narrow head, which reposes on the back of the 

 thorax. The prothorax appears to be seated on the dorsum of the 

 mesothorax. According to Milggenburg there is no trace of a 

 ptilinum. A brief note on the metamorphosis ^ by Baron Osten 

 Sacken indicates that the mature larva differs from that of 



Fig. 249. — Anterior part of the tody of NycteriKa sp., found on Xantho^rpyia. straminea 

 liy Colonel Yerbury at Aden. A, Upper surface of female, with head extended ; 

 B, under surface of male, with head extended ; C, claws of a foot. 



Melophagns in the arrangement of the stigmata ; they appear to 

 be dorsal instead of terminal. There are apparently no characters 

 of sufficient importance to justify the association of these 

 Insects with the other divisions of Pupipara ; the sole ground 

 for this connection being the supposed nature of the life-history 

 of the larva. 



Sub-Order Aphaniptera or Siphonaptera (Fleas) 



Fam. Pulicidae. — Wingless, with the hocly laterally compressed, 

 so that the transverse diameter is small, the vertical one great. The 

 head indistinctly separated from the iocly, small, unth short thick 

 antennae placed in depressions somewhat behind and above the un- 

 fcweted eyes. These are ahvays minute, and sometimxs wanting. — 



^ Tr. ent. Soc. Londun, 1881, p. 360. 



