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JOURNAL, OF ENTOMOLOGY AND ZOOLOGY 105 



and the labrum less heavily chitinized than the clypeus. The labrum 

 (Fig. 21, lb) is slightly concave on Its distal margin, much wider 

 than long, and bears on each side the meson, near the cephalic 

 margin, a number of prominent seta?, whose number appears to vary 

 from two to six according to the age of the pupa. Laterad of the 

 labrum on each side are the mandibles (Fig. 21, md) which were 

 not heavily chitinized in the pupas first examined, but the margin 

 was irregular and the proximal articulation was distinctly seen. 

 Later stages showed the mandibles more heavily chitinized and the 

 mesal margin more distinctly toothed, but the proximal articulation 

 much less distinct. Caudad of the labrum, and separated by a 

 distance equal to one-third the width of labrum, is a pair of well 

 developed maxillae (Figs. 16 and 21, mx). They are elongate, the 

 length more than twice the width, with a prominent projection on 

 the lateral margin bearing a small maxillary palpus (Fig. 16, mp) 

 having a group of long setae. In older pupae the maxillae were much 

 shorter and somewhat broader, so they are more or less rounded, 

 and closely approximate each other on the median line. Caudad 

 of the maxillEE are the labial palpi, which are globular or ellipsoid 

 and very little longer than broad. The labial palpi (Fig. 21, Ip) 

 are covered with setae considerably longer than the appendage and 

 are slightly chitinized at the base and distal end. The mentum and 

 submentum (Fig. 20, sm and m) are distinct in this species, the lat- 

 ter being heavily chitinized. At the base of each maxilla may be 

 seen an Invagination for the posterior arms of the tentorium (Fig. 

 20, pt). 



