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LIST OF SPECIES OF STYLOPIDAE HERE CON- 

 SIDERED. 



STYLOPINAE. 



Gen.? sp. nov. near Xenos. 



KALICTOPHAGINAE. 

 Halictop'hagus. 

 H. scJnvarsii,, sp. nov. 

 H. aiiicricanus, sp. nov. 



subg^. Bruesia, subg. nov. 

 B. oiisfralcn'sis, sp. nov. 

 B. pliacodcs, sp. nov. 

 B. stcnodcs, sp. nov. 

 Megalechthrus, gen. nov. 

 M. tryoiii, sp. nov. 



FLENCHINAE. 

 Elenchus. 



E. tcnuicornis, Curt. 

 Deinelenchus, gen. nov. 

 D. australensis, sp. nov. 



GENERAL STRUCTURE OF STYLOPIDAE. 



As the position of Stylopidae as a whole amongst the Insecta 

 has been a cause of much discussion and disagreement, so the 

 character of various structures has also been diversely in- 

 terpreted. There is no question that the mouth-parts are of an 

 abnormal character, and difficult to study, but that there should 

 have been differences of opinion as to the thoracic sclerites and 

 their appendages is not so easily understood. Even in the min- 

 ute Elenchus, by far the most difficult of the Stylopidae to dis- 

 sect, the prothorax and mesothorax can easily be separatecf 

 entire, each in the form of a complete ring, exhibiting notal, 

 pleural, and sternal portions, well marked, the former sclerite 

 bearing the front legs, the meso-thoracic, in addition to the mid- 

 dle pair of legs, havinp- the ladle-shaped elytra attached to the 

 sides. 



The mouth parts of Elenchus and its other characters have 

 been elaborately discussed by Eaton, but the figure given bs' 

 him is an unfortunate one, owing to the position in which it 

 was drawn ; for of the part which he considers the li^ula. the 

 extremity approximate to the labium is not visible at all. Nev- 



