56 HEMIPTERA-HETEROPTERA. ‘ 
of the antenne, which in typical specimens of M. notulata is black, whilst in the form 
described as VW. discoidea, Dallas, it is luteous or testaceous. This last character, taken 
in conjunction with the less produced and rounded pronotal angles, induced Stal to con- 
sider the two forms as distinct species; but from an examination of a very large series 
of specimens I have found this to be also only a varietal character—forms with acutely 
produced pronotal angles, as in the specimen here figured, having in some cases the 
second joint luteous, whilst in those agreeing with the form described by Dallas the 
second joint is frequently black. 
_ 8. Mormidea hamulata. 
Mormidea hamulata, Stal, Rio. Hem. i. p. 21. 51; Stett. ent. Zeit. xxiii. p. 104. 74°; En. Hem. i. 
p- 21. 138°. 
Hab. Mexico 2.—Cotompia?; Brazit, Rio Janeiro '. 
9. Mormidea tetra. (Tab. VI. fig. 6.) 
Mormidea tetra, Walk. Cat. Het. ii. p. 551°. 
Mormidea grisescens, Stal, En. Hem. ii. p. 21. 197. 
Pentatoma ignobilis in MS. (Mus. Berol.). 
Hab. Mexico” (Mus. Berol.), Oaxaca’. 
The figure is from the type in the British Museum, with which I have had an oppor- 
tunity of comparing a specimen of Stal’s species, kindly forwarded from the Stockholm 
- Museum. 
CEBALUS. 
(Ebalus, Stl, Stett. ent. Zeit. xxiii. p. 102 (1862) ; Ofv. Vet.-Ak. Forh. 1867, p. 527. 
This genus is principally separable from the preceding by the length of the first joint 
of the rostrum, which is much shorter than in Mormidea, and does not reach the base 
of the head. It is not essentially tropical in its habitat, being found in the Nearctic as 
well as in the Neotropical Region. Its closest ally in the Old World would appear to 
be the Ethiopian genus Durmia. 
1. Gbalus pugnax. 
Cimez pugnax, Fabr. Syst. Ent. p. 704.41; Goeze, Ent. Beitr. 1. p. 238. 10; Fabr. Spec. ii. 
p. 348. 57 (1781) ; Mant. 1. p. 285. 66; Gmel. Syst. Nat. i. 4, p. 2140. 211; Fabr. Ent. Syst. 
iv. p. 100. 88; Syst. Rhynch. p. 161. 82. 
Cimex typheus, Fabr. Syst. Rhynch. p. 162. 34’. 
Petatoma orthacantha, Palis. Beauv. Ins. p. 180, Hém. t. 9. f. 9. 
Cimex typheus, Wolff, Ic. Cim. v. p. 180, fig. 174. 
Pentatoma augur, Say, New Harm. Ind. Dec. 1831; Compl. Writ. i. p. 313. 2. 
Cimex vitripennis, Burm. Handb. u. 1, p. 367. 9. 
Mormidea typheus, Dall, List Hem. i. p. 216. 16’, excl. syn. H. schefferi (Stal). 
