1976] 
Henry — Larval Owlflies 
9 
Figure 2. Ululodes mexicana. immature third instar larva with jaws in “trap” 
position. Md = mandible. 
cle. Jaws falcate, smoothly tapering, and significantly longer than 
head capsule; they show a strong upward tilt in lateral view and 
are capable of being opened to an angle of 270 degrees or more 
(figure 2). First tooth always placed proximad of midpoint of 
mandible; central tooth much larger than the other two teeth and 
markedly curved; distal tooth unambiguously the smallest of the 
three and situated closely adjacent to central tooth. Ventral man- 
dibular condyle (MdCV) positively contained within robust U- 
shaped socket formed from anterior ends of subgenal ridge (SgR — 
see figure 3B), the medial arm of which overgrows and nearly hides 
maxillary stipes (St). Postlabium (Plb) flask-shaped in outline 
