MACROCEPHALUS. 5D 
MACROCEPHALUS. 
Macrocephalus, Swederus, Vet.-Ak. nya Handl. viii. p. 183 (1787) *; Westwood, Trans. Ent. Soc. 
Lond. iii. p. 22 (1841) ; Stal, Enum. Hemipt. v. pp. 132,134; Handlirsch, Ann. k. k. naturhist. 
Hofmus. xii. p 181 (nec Olivier, 1789). 
This genus is confined to the warmer parts of America, ranging from the Southern 
United States to Chili and the Argentine Republic. The species are numerous in 
Central America, but of several of them very few individuals have been obtained. The 
females, in most cases, differ from the males in being much paler in colour, and there is 
sometimes a slight modification in the form of the antenne and connexivum in this sex. 
Several species are green in life, this colour changing to ochreous in dried specimens. 
Macrocephalus chiefly differs from Phymata in the greatly developed scutellum and the 
absence of tarsi to the front pair of legs +. 
\ 
a. Scutellum with a laterally dilated median callus extending from the base 
downwards, and also with a more or less distinct median carina, the 
latter sometimes becoming evanescent anteriorly. . 
a’. Lateral angles of the pronotum raised, bilobate; scutellar callus 
sparsely punctured. . ... . se ee ‘ . notatus, Westw. 
b’. Lateral angles of the pronotum not or very little raised, obliquely 
truncate. 
a”. Scutellar callus long, closely punctured ; antenne (3) with joint 4 
scarcely so long as the others united; upper surface con- 
spicuously granulate. . . . . . se ee ew we spersus, 0. sp. 
6”. Scutellar callus short, very sparsely punctured ; antennee ( 3) with 
jomt 4 longer than the others united; upper surface very 
sparsely and finely granulate. . . . . . . . . . « « panamensis, n. sp. 
b. Scutellum with a well-defined median carina only. 
c'. Head and anterior half of pronotum simply granulate. 
ce’, Antenne (¢) with joint 4 very elongate, 3 a little longer than 2; 
body narrow, elongate. 
a’’’, Lateral angles of the pronotum obliquely truncate; body (¢) 
fuscous above, the scutellum with a flavous median vitta, 
extending on to the pronotum. . . woe ee . falleni, Stal. 
b’’, Lateral angles of the pronotum acute ; body ( 3 2) more or less 
ochraceous or green above, the basal half of the pronotum and 
a very large patch on the apical part of the scutellum darker . angustatus, n. sp. 
d”, Antenne (¢ ?) with joint 4 moderately long : 
ce’, Joint 3 nearly twice as long as 2; body (3) moderately elongate, 
variegate above, with the connexivum spotted. . . . . . granulatus, n. sp. 
* The name Macrocephalus is also in use in Coleoptera, fam. Anthribide, but it has priority in Rhynchota. 
+ The short retractile anterior tarsi are received into a groove on the lower side of the tibia in Phymata, 
and not easily seen. 
