
No. 429.] THE MOUTH PARTS OF INSECTS. 689 
In the adult (Fig. 4) we find mouth parts still of simple 
orthopterous type, with parts plainly homologous with the 
various orthopterous parts, and also as plainly with the parts 
of its own larva 
and pupa; but in 
the male the 
familiar but ex- 
traordinary modi- 
fication of the 
mandibles, con- A 
verting them 

from biting and ric. Mouth parts of larva of Anatis 15-punctata. md., mandi- 
mast i catin g "s oe ae E veh ee lobe; »x.P., XS Mg icon: 
organs into a pair 
of long, non-dentate, pointed, clasping organs (md.) for holding 
the female, attracts our special attention. But these organs 
are certainly mandibles; the maxilla (zr. and labium (/.), 
changed slightly to be still more thoroughly orthopterous in 
type, are in their own places, and no other mandibulate organs 
except the claspers are present. In the female the imaginal 
mandibles are of usual biting dentate type. To make sure of 
the mandibulate character of the long claspers we have but 
to dissect the head of an old pupa, as shown in Fig. 5. In 
this figure the pupal cuti- 
cle has been removed from 
the right-hand half of the 
head, while left intact on 
the left side. Removing 
the pupal labial cuticle, the 
imaginal labium, practi- 
cally identical with: the 
pupal one, is exposed, with 

Fic. 7.— Mouth parts of adult A za£is T, 
5-Punctata. 
md, mandible; mx., maxilla; mrj., maxillary be palpi shortened by 
cri n » galea; Za., lacinia; Zi., labium; Z^, — « telescoping” but ready 
to expand to full length; 
within the pupal maxillar sheath the imaginal maxilla in its now 
thoroughly orthopterous character is found, and within the 
comparatively short, strongly dentate, pupal mandible is found, 
