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 ORDER HEMIPTERA. 



Mouth proniuscidate ; metamorphosis incomplete. 



SUBORDERS. 



Wings uniformly membranous or horny Suborder I, HOMOPTERA. 



Front wings basally horny, apicaily membranous ; hind win js memhranou-;. 



Suborder II, HETEROPTERA. 



Suborder I, HOMOPTERA. 



TABLE OF DIVISIONS. 



Beak issuing from the inferior part of the head 



Div. I, AUCHENORHYNCHA, A. et S. 



Beak apparently issuing from the sternum 



Div. II, STERNORHYNCHA, A. et S. 



Division I, AUCHENORHYNCHA, Amyot et Serville. 



TABLE OF THE FAMILIES. 



Front wings most frequently opaque or parchment-like; hind wings membranous. .2 

 All wings most frequently membranous or horny, strongly areolated. 

 ^Ocelli 3 on the vertex ; antenna setiform, placed between the eyes ; thorax 



normal ; fore femora thickened, toothed beneath ; males musical 



Fam. I, Cicadidae. 



**Ocelli most frequently 2, usually placed beneath the eyes or in hollow cavities in 



in the cheeks, a 3rd ocellus sometimes on the front ; antennae always placed 



beneath the eyes ; frons often produced, carinated. . . Fam. II, Fulgoridas. 



***Ocelli 2 on the crown ; antennae between the eyes ; thorax abnormally developed, 



usually completely covering the scutellum ; legs foliaceous, prismatic or 



rounded Fam. Ill, Membracidae. 



2 Thorax normal ; ocelli 2, seldom absent ; antennne setiform, placed between the 

 eyes. 



fOcelli always placed somewhere on the vertex Fam. IV, Cercopidae. 



■f fOcelli always on the frons and below the superior margin 



Fam. V, Bythoscopidae. 



ttfOcclli in front of the eyes on the rounded edge of the superior margin, but never 



on the vertex P'am. VI, Jassidae. 



Division II, STERNORHYNCHA, Amyot et Serville. 

 TABLE OF THE FAMILIES. 



Tarsi i-jomted 2 



Tarsi 2-jointed. 



Beak 3- or 4-jointed ; wings most frequently membranous. 



Antennze lo-jointcd ; abdomen without honey tubes Fam. VII. Psyllidae. 



Antennae 3- to y-jointed ; abdomen frequently with honey tubes 



Fam. VIII, Aphididae. 



Beak 2-jointed ; wings opaque, farinose Fam. IX, Aleurodidse. 



2 Males with only 2 wings, seldom apterous ; females always apterous, mite like ; 

 antennae 6- to ii-jointed ; and all the species reach maturity under waxy secre- 

 tions, filamentary down or in galls Fam. X, Coccidae. 



