The Larvee of the Furniture Beetles. 225 
Viewed from the underside the head shows the following regions 
(Fig. 3) — 
The Occipital foramen (0)—A large, somewhat oval-shaped opening. 
The Gene, or cheeks, surround the occipital foramen on either side. 
The Gular plate (v) lies above the anterior border of the occipital 
foramen. 
The Mawille and Labiwm with their palps lie anterior to the gular plate ; 
they have been removed in Fig. 3, but are shown in more detail in Fig. 5. 
Fig. 3. 
Head of larva of A. domesticwm seen from below ; the maxille, 
labium and mandibles removed. 
The Mandidles again appear as two triangular structures extending from 
side to side of the head. 
If the maxilla, labium and mandibles are removed, as in Fig. 3, the 
following additional regions can be seen :— 
The Maxillary foramen (7) — A rectangular cavity lying above the 
gular plate. On its lateral borders lie two less definite plates—the 
hypostomes (hy) bearing the maxillary condyles (h). On its anterior border 
is a narrow strip of chitin called by Hopkins! the hypopharyngeal bracon (/). 
The epistome, clypeus and labrum can also be seen. 
Attached to the labrum are two little rods, the labral hooks (LA.). 
In the figure these rods appear white, the frons, epistome, clypeus and 
1 Hopkins, The genus ‘‘ Dendroctonus,” U.S. Bureau of Entomology, Bulletin 1909. To 
save duplication the nomenclature of Hopkins has been followed with slight modifications. 
In this an excellent description of the larve of the genus Dendroctonus (Scolytide) is given. 
