— 5 o — 



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 portion of the maxilla. From the subgalea the 

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

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

 piform in character. The lacinia is strongly chitinized, and 

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

 curved spines, and on its dorsal aspects 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 cephalic 

 transverse portion of the gula by a straight, transverse 

 suture. The submentum 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 mentum, 

 with a mesal, cephalad-projecting, two-pointed tongue. From 

 the elongated, subcylindrical, cephalad-projecting palpigers 

 arise the three-segmented labial palpi, the first segments of 

 which are very .short. Also projecting cephalad from the 

 mentum is the ligula, composed of a dorsal or inner, deli- 

 cate, transparent, membraneous part, which divides distad 

 into two, slender, tapering projections, the paraglossia, and a 

 ventral or outer, chitinized, undivided portion, the glossa. 

 The tip of the glossa is truncate, and bears two, long, strong 

 hairs. The paraglossae lie slightly laterad of the distal half 

 of the glossa. The entire ligula arises, not from the cephalic 

 margin of the mentum, but from its inner or dorsal face, and 

 it may be that its parts are not homologous with the terminal 

 lobe (ligula) of the locust's labium, but that one or perhaps 

 both parts are continuous with the lining of the mouth 

 cavity ; in which case they would be homologous with the 

 hypopharynx of the locust's mouth. 



