564 INSECTA. 



The female of the last-named species protects her young with great care, leading them about as a hen does her 

 chickens. 



Heteroscelis, Latr., is formed for the reception of a species from Cayenne, having- the liead cylindrical, the 

 anterior tibia; broad and palette-like. 



Canopus, Fabr., as shown by the recent observations of M. Alexandre Lefebvre, is composed of small South 

 American insects, not yet arrived at their full developement, having the body rather compressed, and very convex 

 above, concave beneath, and the ocelli, as well as the wings, wanting]. 



[The preceding insects form the family Pentatomidoc, Leach; Penfatomites and Scutelleritcs, Laporte; and 

 Scutati, Burmeister. The number of genera into which they have been divided by these authors, as well as by 

 Hahn, in his Die Wanzenartigcn Insecten, is very greatly increased, and has probably been carried too far.*] 



Sometimes the antennae have only four joints, and the body is ordinarily oblong. In some of these the antenna; 

 are filiform or clavate. 



Some exotic species approach the preceding in the general form of the body, being rather ovoid than oblong, 

 and are distinguished from all the following by being either very flat, membranous, with the margins very strongly 

 dilated and angular, or by having the prothorax posteriorly prolonged into a truncated lobe, and the sternum 

 cornuted. Such is 



Tesseratoma, Lepel and Serv. Type, Edessa papulosa. Fab. 



Dinidor, Latr., has similarly 4-jointed antennae, but the thorax is not posteriorly lobed, (Edessa obscura, 

 mactans, &c.) 



PkUea, Lep. and Serv., is quite flat and membranous, with the sides of the body dilated and angular, the ante- 

 rior extremity forming a flattened, truncated hood, hiding the antenna;, which are very short, apparently 3-jointed, 

 and elbowed. [P. corticata, a singular Brazihan insect.] 



All the others have the body generally oblong, and do not exhibit such characters as the last group. Some ( f 

 these have the antenna; inserted near the lateral and superior margin of the head ; the ocelli are close together, 

 or at the same distance apart as they are from the eyes. 



Coreus, Fab., has the body oval ; the last joint of the antennas ovoid or fusiform, often thicker and not longer 

 than the preceding. C. margbiat us, Geoff, [a common English species]. From the proportions of the joints of 

 the antennae the species may be thus subdivided. Goiwcenis, with the third joint of the antenna; compressed and 

 angular at the sides,— C. sulcicor7iis, insidiator, &c. ; Syromastes, with the third joint of the antennae simple, and 

 longer than the fourth,— C. marginatus, &c. ; Coreus, with the last joint of the antenna; much longer than the 

 fourth, and compressed,— C. hirticornis, &c. 



Holhymenia, Lep. and Serv., has the second and third joints of the antennae plate-like. [Exotic species.] 



Pachylis, Lep. and Serv., has the third joint alone of this form. 



Anisoscelis, Latr., has the antenna; filiform, without dilatation ; some have the posterior tibia; with a broad mem- 

 brane,—!., membranaceus, F., &c. The others, L. valgus, &c., have not, [but the hind femora are often grotesquely 

 thickened. These are exotic species of large size.] Some of the species, with long slender antennae, form my 

 genus Nematopus. 



Alydiis, Fab., has the body long and narrowed ; the eyes prominent ; the ocelli close together, and the thorax 

 slightly broader behind. [A. catcaratus, a rare British species]. 



Leptocorisa, Latr. [part of Gerris, Fab.], has the body long and filiform ; the antennae and legs are also greatly 

 elongated, and the former straight. 



Neides, Latr. (Berytus, Fab.), has the antennae elbowed. [Small singular insects, three or four species of which 

 occur, but rarely, in this country. C. tipularlus, Linn.] 



We now pass to the Geocorisa which have the antennae similarly filiform, or thickened at the tips, and 

 4-jointed, but inserted lower than in the preceding ; the ocelli are close to the eyes, and the apical membrane of 

 the hemelytra has only four or five nerves. [These form the family Lygaida.'] 



Lygteus, Fabr., has the head narrower than the thorax, which is narrowed in front,— C. equestris, Linn. C. ap- 

 terus, Linn. ; red, with the head, a spot on the thorax, and two on the hemelytra, black ; the wing-covers without 

 apical membrane, but occasionally this, as well as the wings, is fully developed. [The ocelli are wanting in this 

 species, which forms the type of the genus Pyrrhocoris, Fall. ; Platynotus, Schill. ; or Astemma of Lep. and Serv. 

 It is occasionally found in this country.] 



The species with the fore-legs thickened form the genus Pachymerus, Lep. and Serv., but which name having 

 been previously used, must be changed. [The species are very numerous, and form Halm's genus Rhy- 

 parochronus.l 



[Geocoris, Fallen, Opihalmicus, Schill.] Salda, Fab., has the head as broad as the thorax, and often dilated 

 behind, with large eyes, S. atra, grylloides, &c., Fabr. 



Myodatha, Latr., has the hind part of the head elongated into a neck. 



We now arrive at those Geocorisce longilabres with four-jointed antennae, slender, and often capillary at the tips. 



Astemma, Latr. has the second joint of the antennae of equal thickness, the thorax scarcely broader behind than 

 in front, transverse, quadrate, or cylindrical. Salda palUcornis, &c. 



Miris, Fab., resembles Astemma in the antennas, but has the thorax narrowed in front. 



Capsus, Fab., has the thorax trapezoid, and the second joint of the antennae slender at the base, pilose and thick 

 at the tip. [C. ater, and a great number of English species.] 



• The Rev. F. W. Hope has published a catalogue of the species i species. Germar has also added many new genera and species in the 

 belonging to this tribe, with the description of a great number of new ' first part of his Zeitschri/t fur die Entumologie, 1839. 



