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three sclerites may be distinguished when the maxilla is 

 viewed from the dorsal aspect by the following characters ; 

 the palpifer lies above the distal two-thirds of the stipes, 

 and also overlaps part of the subgalea. It is elongate, sub- 

 triangular in outline with apex directed toward the lacinia. 

 From it arises the four-segmented palpus, and it also bears 

 near the origin of the palpus a single, conspicuous, long 

 bristle. The stipes as seen from above is elongate and 

 rather slender, with the basal extremity widened. It lies 

 laterad of the large subgalea, which forms the inner or mesal 

 half of the median portion of the maxilla. From the sub- 

 galea the two lobes, galea and lacinia^ of the maxilla arise. 

 The galea is slender, elongate, distinctly two-segmented, and 

 palpiform in character. The lacinia is strongly chitinized, 

 and is beset on its inner face with strong and long, curved 

 spines, and on its dorsal aspect with many, weaker hairs. 

 It bears on its distal end a strong tooth or curved tip, known 

 as the digitus. 



Make a drawing of the dorsal aspect of a maxilla. 



Labium. — The labium is separated from the cepttalic 

 transverse portion of the gula by a straight, transverse 

 suture. The subinentum is large, strongly chitinized, and 

 with its lateral portions appearing as broad, expanded lobes, 

 • separated by a broad and deep, cephalic emargination. 

 Bordering this emargination is the narrow curving moitum, 

 with a median forward-projecting, two-pointed portion. 

 From the elongated, subcylindrical, forward-projecting pal- 

 pigers arise the three-segmented labial palpi, the first seg- 

 ments of which are very short. Also projecting forward 

 frbm the mentum is the ligula, composed of a dorsal or 

 inner, delicate, transparent, membranous part, which divides 

 at its tip into two, slender, tapering projections, the para- 

 gloss(t, and a ventral or outer, chitinized, undivided portion, 

 the glossa. The tip of the glossa is truncate, and bears two, 



