604 



Dr. B. Keilin 



Larva A: Figs. 1 and 2. — Full-grown larvae, seen laterally. Fig. 3.— 

 Anterior portion of tlie larva, sliowing tlie thoracic segments, the 

 head or the pseudocephalon, and the bucco-pharyngeal armature : 

 a, antenna ; b, maxillary palps ; c, ventral sensory organ ; d, labial 

 palp ; A, hypopharyngeal sclerite ; /, intermediate sclerite ; /, lateral 

 hooks ; J), basilar or pharyngeal sclerite ; », prothoracic spiracles. 

 Y\^. 4. — Posterior end of the siphon, showing the postabdominal 

 spiracles. The scale represents only the maguification of the 

 figs. 1 and 2. 



