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DIPTERA APHANIPTERA 



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

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

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

 mesothorax. According to Mliggenburg there is no trace of a 

 ptilinum. A brief note on the metamorphosis 1 by Baron Osten 

 Sacken indicates that the mature larva differs from that of 



Fig. 249. — Anterior part of the body of Nycteribia sp., found on Xantharpyia straminea, 

 by Colonel Yerbnry at Aden. A, Upper surface of female, with head extended ; 

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



Melophagv.s 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 body laterally compressed, 

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

 head indistinctly separated from tin- body, small, with short thick 

 antennae placed in depressions some/chat behind and above the un- 

 faceted eyes. These are always minute, and sometime* wanting. — - 



1 Tr. tut. Soc. London, 1881. p. :J60. 



