HETEROPTERA. — SCUTELLERIDE. 487 
been described by Kirbyand Spence (JZnérod. vol. iii. p.714. and pl. 29. 
f. 22.) as pseudo-spiracles, and which M. Lefebvre, in his memoir on 
Canopus (jig. 122. 16.) has named gibbosités excavées.* 
There is a very great diversity of form in the insects of this family, of 
which the most striking consists in the immense development of the scu- 
tellum in many species, which has induced Laporte to separate them 
into two families, Scutellerites and Pentatomites, but the connection 
between the two groups is so completely established by many exotic spe- 
cies, that I have not adopted this mode of classification ; in like manner, 
I have not employed the name Pentatomide for the entire group, since 
many exotic species possess but four joints in the antennz, whereas 
the scutellum in all is large, and in many entirely covers the abdomen 
and wings when at rest: an example of this is given in fig. 122. 13. 
representing Coptosoma globus (15, its antenna), a small European 
species, in which the scutellum is broader than long; the fore wings 
are also very long, and from the peculiar form of the body in this group, 
it is necessary that they should be partially folded in repose (fig.122. 14.), 
a peculiarity observed in no other Hemipterous genus. (See my me- 
moir hereon in Mag. Nat. Hist., n. ser., vol. ii.) The pupe cof the 
Scutelleridze are very convex, but exhibit no extraordinary enlarge- 
ment of the scutellum ; this is even the case in some pupe of a Mau- 
ritian species in my collection, closely allied to Coptosoma, belonging to 
my genus Plataspis. Dr. Klug has figured the larva (pupa?) of Tetyra 
ocellata (Symb. Phys. pl. 43. f.'7.), in which the scutellar region ex- 
tends further over the back. The pupa of a species of Tesseratoma 
is also figured in Griffith (An. Kingd. Ins. pl. 93. f. 1.) under the name 
of T. ossa-cruenta. Amongst the exotic species, those comprising the 
genus Calidea deserve mention on account of their brilliant metallic 
colours; Dryptocephala, Discocephala, and Phleea+, on account of 
their apparent relation with the Aradi; whilst Cephalocteus Duf, 
Scaptocoris Perty, Oncomeris Burm., Oncoscelis Westw., and others, 
* From M. Lefebvre’s figures of this genus, which has so much perplexed ento- 
mologists, it is evidently an insect in an immature state, possessing no ocelli, 
4-jointed antenne, and 2-jointed tarsi: whether the insect always retains “ cet 
état de perfection imparfuite,” as suggested by M. Lefebvre, is perhaps, from these 
circumstances, questionable, as we have clearly seen that these imperfect perfect 
insects are imperfect only in respect to their organs of flight. 
+ The observations of Spinola on the relations of this genus have induced me to 
retain it in this family, from which it has been remoyed by Brullé. 
II 4 
