HEMIPTERA. lOd 



Certain Geocorisae of the same division, with a narrow and elon- 

 gated body, projecting eyes, the ocelli approximated, and the thorax 

 merely a little narrower before than behind, and almost trapezoidal, 

 form the subgenus 



Alydus, Fab. *, 



Now come Geocorisae with a very narrow, long, filiform, or linear 

 body. The antennae and legs are also proportionally smaller. 



Leptocorisa, Lat. 

 Where the antennae are straight \. 



Neides, Lat. — Berytus, Fah. 



Where those organs are geniculate :j:. 



We now pass to Geocorisae in which the antennae, also filiform or 

 thicker at the extremity and quadriarticulated, are inserted lower than 

 the preceding ones, either on an imaginary line, drawn from the eyes 

 to the origin of the labrum, or beneath it. The ocelli are approxi- 

 mated to the eyes, and the membranous appendages of the elytra fre- 

 quently present but four or five nervures. 



Here the head is not narrowed posteriorly in the manner of a neck. 



LvGiEus, Fah. 



Where the head is narrower than the thorax, and where the latter 

 is narrowed anteriorly and is trapezoidal. 



L. equestris; Cimex equestris, L.; Wolf, Cimic, I, iii, 24. 

 Length five lines; red, with black spots; membranous portion of 

 the elytra brown, spotted with white. 



L. a pier us ; Cimex apterus, L. ; Stoll, Cimic, II, xv, 103. 



Length four lines; apteious; red; the head, a sjjot on the middle 



of the thorax and large dot on each elytron, black ; extremity of 



the elytra truncated or without a membranous appendage. Very 



common in our gardens. It is sometimes, though very rarely, 



found with wings. 



Those species in Avhich the anterior thighs are inflated, form the 



genus Pachymera. of MM. Lepeletier and Serville, a name already 



employed, and which must be changed §. 



Salda, Fah. 



Where the head, taken in its greatest breadth, is as wide as the 

 thorax or wider, and has its posterior angles dilated, with large eyes, 

 and where the thorax is always of equal width, and square ||. 



There, the head is ovoid and narrowed posteriorly in the manner 

 of a neck. 



* See the Syst. Ryngrator., Fab., p. 248. 



f The Gerris of Fabricius, with the exception of the vagabundus. 

 X See Lat., Gener. Crust, et Insect., Ill, p. 126 ; and Oliv., Encyclop. M^tho- 

 dique. 



§ See Fab., and Lat., Gener. Crust, et Insect., Ill, p. 121. 

 II The Saldae, atra, albipennis, grijiloides, Fab. 



