24 Dana on the Classification of Animals 
stouter or grosser aie ws and their greater diversity as to size and 
shape; in the jaws the highest species being perfunctionate 
to a less degree; wie very decidedly in their metasthenic nature 
as regards the wings, the anterior pair being only wing-covers 
or elytra. The mouth is mandibulate, and often rodent as we 
as feeding. In some species there is a degree of care for the 
oung that approaches somewhat that in the Hymenopters. 
They never live in communities for mutual work. The food, 
like “shat of Dipters, is various, being either vegetable, articulate- 
animal or vertebrate-animal, the last either living, freshly dea 
or decaying. The species are mostly perterrestrial. They are 
all permaturative. 
ipters—Among Hemipters the structures are rather 
laxly put together compared with those of Coleopters, the body 
thinner and ‘softer, the wings usually more or less overlapping ; 
and their strength for the same size very much less. There are 
some of the same differences between Hemipters and Coleopters 
as between Dipters and co ewes Though never very 
large, they appear to be amplificate species, —sometimes broad- 
amplificate, being _ for their breadth, and sometimes long- 
~ lifcate. The elytra are coriaceous na ty in the basal half; 
this t thinning of the. w ing-covers comports with their being 
large. The ii are semicoriaceous. Both pairs of wings are 
sometimes obsolete. The mouth is mandibulate, and simply 
wing and feeding in function. The species are mostly per- 
terrestrial, never semiaquatie ; all are prematurative 
e Ort rthopters include three grand subdivisions,—the Jirst 
and second representatives respectively of Coleopters and Hemip- 
ters, and the third typica 
(1) The Cursors or Coleopteroid species consist of the Blatta and 
Forficula groups, which, though elongate, are still comparatively 
short in body, and much like “‘Coleopters ; the wings in the Blat- 
tids are rather lax, and the bodies soft for the size. 
(2) The Ambulators or Hemipteroid species, that is, the Man- 
tids and Phasmids. The species are often thin and broad, and 
‘Simulate leaves, bark and sticks in color and markings; and in 
this respect this group and the Hemipters show an approxima- 
tion. There is also some approach between these groups in ~~ 
