ACANTHOSOMA.—PIEZOSTERNUM. 101 
on the 6th of June laying eggs; over these she brooded without moving till the 29th, 
when the young bugs were hatched. On July 9th they moulted, and on the 13th 
began to move off their native leaf.” According to Townend Glover, the only species 
here included (A. laterale, Say) is considered by Prof. Uhler to be the North-American 
representative of the above. 
1. Acanthosoma laterale. (Tab. X. fig. 5.) | 
Edessa lateralis, Say, New Harm. Ind., Dec. 1831 ; Compl. Writ. i. p. 312. 2%. 
Edessa nebulosa, Kirby in Richards. Faun. Bor.-Am. Ins. p. 277. 1°; Bethune, Can. Ent. vol. x. 
p. 138. | 
Acanthosoma nebulosum, Dall. List Hem. i. p. 807. 12°. 
Elasmostethus nebulosus ?, Stal, Stett. ent. Zeit. xxiti. p. 109. 94+. 
Acanthosoma lateralis, Stal, En. Hem. ii. p. 61. 2; Town. Glover, Ill. Ins. Ord. Hem. p. 21. 
Acanthosoma nebulosa, Stal, En. Hem. ii. p. 61. 5. 
Acanthosoma laterale, Uhler, Proc. Bost. Soc. Nat. Hist. vol. xix. p. 381°. 
Hab. Norta America !235,—Mexico * (coll. Sign.). 
Uhler ® states that this species is widely distributed in Canada, British America, and 
the Northern States. The specimen figured is from Mexico, and is in the collection of 
Dr. Signoret, who enabled me to compare it with the North-American specimens in 
the British Museum, which have been identified by Mr. Dallas as A. nebulosum. It 
does not differ in any respect from these ; and I agree with Prof. Uhler in considering 
Kirby’s name a synonym only of Say’s A. laterale. 
Subfam. TESSARATOMINA.. 
Tessaratomina, Stal, Hem. Africana, i. p. 33 (1864). 
The insects comprising this subfamily are found principally in the Ethiopian, 
Oriental, and Australian Regions, and are also there found in their largest size and 
most representative forms. The Tessaratomine form a very small addition to the 
Pentatomide of the Nearctic and Neotropical Regions. 
PIEZOSTERNUM. 
Piezosternum, Amyot & Serville, Hist. des Hém. p. 161 (1843) ; Dall. List Hem. i. p. 317. 6 
(1851) ; Stal, Hem. Afr. i. pp. 224 & 227 (1864) ; En. Hem. i. p. 63 (1870). 
Salica, Walker, Cat. Het. iii. p. 469 (1868). 
The principal structural characters of this genus are the sternal keel produced to the 
anterior coxe, the posterior margin of the pronotum produced over the base of the 
scutellum, and the five-jointed antenne. 
One species is abundant in West Africa; another has lately been discovered in 
Madagascar ; and three others are recorded from the Neotropical Region, of which one — 
only has yet been found in Central America. ° 
