INSECTA. 447 



Sub-genus : Pyrrhochoris FALL., BURM. Ocelli none. 



Sp. Lygceus apterus FABR., Cimex apterus L., WOLFF, Wanzen, Tab. vi. fig. 

 102; STOLL, Wantzen, PI. 15, fig. 103; 42'" long, black with a red margin 

 round the thorax, red shield-covers with a black point at the base, and a 

 larger round spot of the same colour in the middle ; the membranous portion 

 of the shield-covers is very short; wings commonly wanting. 



Sub-genera furnished with, eyes : Lygceus, Xylocoris LEON DUFOUR 

 and others, on which comp. BURMEISTER, 1. 1. pp. 288 299. 



Coreus FABR. Ocelli two. Body ovate or oblong. Antennae 

 straight. 



Sub-genera : A lydus FABR., Corizus FALL, and others, for which 

 see BURMEISTER, 1. 1. pp. 301, &c. 



Sp. Coreus quadratus FABR., WOLFF, Wanzen, Tab. vn. fig. 67 ; HERRICH 

 SCH^FFER Deutsckl. Ins. Heft 118, Tab. 12, &c. 



Leptocorisa LATR. (Gerris in part; add Berytus FABR., Neides 

 FABR.) Ocelli two. Body elongate, linear. Antennas in some 

 straight, in others broken. 



Sp. Berytus tipularius FABR., Cimex tipularius L., DUMERIL, Cons. gen. s, 

 I. Ins. PI. 36, fig. 7 ; WOLFF, Wanzen, Tab. xx. fig. 198. 



B. Scutellum large, produced as far as the middle of abdomen. 



Cimex FABR. Antennae mostly five-articulate (Pentatoma OLIV., 

 LATR.), in some four-articulate (Tesserotoma LEPELET., SERV.) 



Note. The generic name Cimex I judged formerly, with LATREILLE, to 

 be attributable to Cimex lectularius, according to the rule of LINNAEUS (Phil. 

 Botan. 246), which says that if a received genus is to be sub-divided, the 

 previously common name ought to remain with the species most commonly 

 known (species vulgatissima) ; but it seems advisable to give a received 

 name to numerous species rather than to a few. Besides, a new name 

 would be required, for that given by OLIVIER, Pentatoma, is inapplicable to 

 several species of this genus, and the distinction taken from the number of 

 joints of the antennae is artificial, often severing affinities. For many 

 genera of modern writers, not here recorded, see BURMEISTER, 1. 1. p. 347, 

 &c., and AMYOT et SERVILLE, Hemipt. pp. 72 182. 



Genera of FABRICIUS, Cydnus, Halys, Edessa, jffilia, Cimex. 



Sp. Cimex laccarum L., PANZER, Deutschl. Ins. Heft 33, Tab. 18; WOLFF, 

 Wanzen, Tab. vi. fig. 57; 4^'" long, the head and thorax red-brown with a 

 shade of green, and many impressed minute black points ; the scutellum 

 yellow at the point, the abdomen black above with yellow spots at the 



