BIBLIOGRAPHICAL NOTICE. 



285 



I 



g 





Artificial Divisions of the Family. 



I. Legs of two kinds, anterior am- 

 bulatory ; posterior scansorial ; 

 thorax large, not distinctly se- 

 parated from the abdomen Genus I. PHTHIRIUS, 



(1 species.) 



II. Legs all scansorial ; thorax large, 

 not distinctly separated from 

 the abdomen ; abdomen of seven 



segments Genus II. PEDICULUS, 



(3 species.) 



III. Legs all scansorial ; thorax gene- 

 rally narrower than the abdo- 

 men, and distinctly separated ; 

 abdomen of eight or nine seg- 

 ments Genus III. H^MATOPINUS, 



(15 species.) 



Fam. II. PHILOPTEEIDu, Burmeister. 



Synonym. Orthoptera epizoica, Nitzsch. Nirmidae, Leach. 



Essent. Char. Antennae filiform, with three or five joints ; maxillary 

 palpi none ; mouth with strong mandibles. 



Nat. Char. Mouth beneath ; maxillae none ; mandibulae nearly con- 

 cealed by the labium ; pro-thorax narrower than the head ; mesothorax 

 none, or hid by the metathorax, which is very large ; abdomen with nine 

 segments ; oesophagus long, unilateral, ending somewhat acutely in the 

 caecum ; biliary vessels four, free, equal, without any particular enlarge- 

 ment. Males with two testicles on each side ; females with five ovaries 

 on each side of the uterus. Coitus exercetur mare femine submisso hu- 

 jusque pedes tertios tenente antennis, si hae sunt cheliformes. Meta- 

 morphosis indistinct, perhaps none ? 



Artificial Divisions of the Family. 



o 



I 



/ 1. Antennae 5 

 jointed; tarsi 

 with 2 claws ; 

 parasitic upon 

 birds 



II. Antennae 3 

 jointed; tarsi 

 with 1 claw; 

 parasitic upon 

 quadrupeds. 



Genus. 



>!. PHILOPTERUS.J 



Sub-genus. 



I. Docophorus, (59 species.) 

 II. Nirmus, (59 species.) 



III. Goniocotes, (2 species.) 



IV. Gonioides, (9 species.) 

 V. Lipeurus, (18 species.) 



Wl. Ornithobius, (3 species.) 



II. TRICHODECTES, (10 species.) 



