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33tbluisrapl)tcal 



Monographia Anoplurorum Britannia ; or, an Essay on the British Spe- 

 cies of Parasitic Insects, belonging to the Order Anoplura of Leach, 

 with the modern divisions of the Genera according to the views of Leach, 

 Nitzsch, and Burmeister, with highly magnified figures of each Species, 

 By Henry Denny, Curator of the Leeds Philosophical Society, 8$c., &c. 

 London. G. Bohn. 1842. pp. 262. 26 Plates. 



THE present volume is one of that class, which never fails to call forth 

 the admiration of every lover of nature, whether scientific or not, as it 

 cannot do otherwise than show the zeal, assiduity, and attention the 

 author has given to this inconspicuous order of beings, by developing 

 and bringing to light nearly one hundred new species, of whose exist- 

 ence there was not hitherto any decided proof. 



The following will show the arrangement adopted in the work, and 

 the number of species described under each genus, with brief characters 

 of the Families and Genera : 



Sub. Class. I. HEMIMETABOLA, Burmeister. 

 Order II. ANOPLURA, Leach. 



Synonym. Aptera, Linne. Antliata, Fabr. Arachnida Parasita, 

 Latr. Rhophotera, Cluirville. Rhyncota, Burmeister. Arachnides 

 Acaridiennes, Lamarck. 



Section I. Haustellata. 



Fam. I. PEDICULID^E, Leach. 



Synonym. Hemiptera^ epizoica, Nitzsch. Fam. II. Siphunculata, 

 Latr. 



Essent. Char. Antennae of 5 joints, mouth with a fleshy Haustel- 

 lum. 



Nat. Char. Apterus, parasitical ; mouth consisting of a fleshy tuber- 

 culous inarticulate haustellum, armed at the extremity with retractile 

 hooks ; legs scansorial, tibiae short, thick, armed at the apex on the 

 inner side with a strong tooth, which, together with the large curved 

 tarsus and unguis, forms a claw ; tarsus one-jointed, unguis single ; 

 oesophagus, none ; biliary vessels four, free, equal in length, enlarged 

 towards their extremities. Males with two testicles on each side ; fe- 

 males with five ovaries on each side of the uterus. Coitus exercetur 

 mare femine submisso. Food the blood of animals. 



