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dian, dark-brown, longitudinal line. (This line may indicate 

 a coalescence of galea and lacinia into this one blade-like 

 compound sclerite.) This line bears several hairs, and there 

 are scattering hairs elsewhere on the sclerite, especially 

 toward the distal end. Near the proximal end of this distal 

 segment of the maxilla, and between the longitudinal line 

 and the outer margin, many two-jointed papillae (taste 

 organs ?) can be seen with a high power. 



Maxillary palpi. — The maxillary palpi zx^ minute, exarticu- 

 late, outward-projecting pieces, arising from near the outer 

 end of the suture separating the proximal from the distal 

 segment of the galea. 



Labium. — The parts of the labium present are the sub- 

 mentum, mentum, glossa, paraglossae, palpifer, and palpi. 



Submentum, — The submentum is a small, shield-like piece ; 

 its proximal end is connected by two chitinous bands, the 

 lora, with the cardo of each maxilla ; its distal end articulates 

 with the mentum. The submentum is rather feebly chi- 

 tinized. 



Mentum. — The mentum is rather oblong in shape, with 

 rounding corners, and strongly chitinized. 



Glossa. — Rising from the distal end of the mentum is the 

 long glossa, which terminates in a small transparent lobe or 

 flabellum. The glossa should be .carefully examined under 

 low and high magnification. Note the reticulated and hairy 

 surface. The visible surface is that of a sheath which en- 

 closes a slender flexible rod, the rod being probably con- 

 cerned with the movements of the organ. 



ParaglosscB. — At each side of the glossa, and rising from 

 near its proximal end are two subtransparent lobes or flaps, 

 extending about one-fifth the length of the glossa. These 

 are the paraglossae. 



Palpifers and Labial Palpi. — Lying just laterad of the para- 

 glossae and rising from the distal end of the mentum are 



