i93 
4- The Mouth Parts.—{Vide p. 80). 
123 4 
Fig. 63. Lateral Hairs of Antennae 
1. M. rossi 2. N. stephensi 3. A. lindesayi 
4. M. nigerrimus 
5. The Clypeal Hairs .—These are four or six 
in number (Fig. 64). Two spring from the extreme 
front of the clypeus near the middle line ; two from 
the outer corner of the clypeus immediately over 
the feeding-brushes, and two usually very small and 
not always present behind the origin of the others. 
The clypeal hairs are best seen when the feeding 
brushes are retracted. They must not be confounded 
with certain other hairs on the larval head. These 
are :— 
(i) Six large branched hairs arising from the 
prominence lying between the bases of the antennae. 
(ii) Four similar branched hairs, but smaller, 
situated further back (Nuttall and Shipley). 
The hairs exhibit great variation in different 
species, but are quite constant in the one species.* 
* Ed. and Et. Sergent describe variations in these hairs in A . algeriensis . In 
eighteen out of forty-six examined both were simple. In three out of forty-six 
both were slightly branched. In twenty-five out of forty-six the central hair had 
two or three small terminal branches. 
O 
