HETEROPTERA. — REDUVIIDE. 471 
some of the more minute Lygzide; possessing ocelli, apical ungues, 
and a distinct scutellum in the winged state. 
The situation of this family in a natural arrangement of the Hetero- 
ptera is difficult to be determined. In the Régne Animal, and by 
Burmeister and Dufour, they are introduced between the Hydroco- 
rise and the Acanthiide; thus unnaturally interrupting the passage 
from Acanthia and Pelogonus to Aphelocheirus and Naucoris.* The 
mere circumstance of their walking upon the surface of water appears 
to have been considered as sufficient to prove their relationship with 
truly aquatic species, with which, in structure, they present but little 
agreement. By placing them in this situation, I retain all the water 
groups together; but this is done at the expense of the relation be- 
tween Acanthia, Leptopus, Macropthalmus, and the other true Re- 
duviide. Laporte places them at the head of his Anthothelges; but 
their food certainly consists of other insects. 
The sixth family Repuviipz + (fig. 120. 15. Reduvius personatus) 
is of great extent, and consists of terrestrial species, well distin- 
guished by the short, thick, naked, and curved rostrum, the labrum 
exserted (fig. 120. 16. head of R. pers.) ; the head narrowed behind 
into a more or less elongated neck, and furnished with two large 
prominent eyes and two ocelli; the antennz are of moderate or con- 
siderable length, with the terminal joints very slender +; the pro- 
thorax is often spined as well as more or less completely divided into 
two parts; the legs are long, and fitted for running; the tarsi 
3-jointed and simple, the basal joint being very short; the anterior 
* Latreille, inthe Gen. Crust, &c., avoided this, by placing them between the 
Reduviidz and Cimicidz, which are, however, closely allied together. 
+ Brstiocr. RErer. TO THE ReEpDvUVIIDz&. 
Burmeister, in Trans. Ent. Soe. Lond. vy. ii. pl. xi. (Myocoris). 
Serville, in Ann. Sci. Nat. t. xxiii. (Pierates). — Ditto, in Guérin, Mag. de Zoo- 
logie, and in Encyclop. Méthod. 
Heineken, in Zool. Journ. vol. v. (Cerascopus). 
Gray, on Ptilocerus, in his Zool. Miscell., No. 1. 
And the general works of Klug, Hahn, Burmeister, Laporte, Boisduval, Perty, 
Palisot Beauvois, Say, Griffith (An. K.), Coquebert, Guérin (Voyages), §¢c. Sc. 

¢ In some species, some of the joints have a minute rudimental joint at the base. 
HH 4 
