Dorsal sclerite of labrum (Figure 278) light brown; posterior margin 

 pinkish brown in middle; lateral margin broadly brown, blackish brown 

 posteriorly; posterior -angle sclerites black laterally and posteriorly; 

 median anterior depression deep, dark; seta 1 in form of small, blunt, 

 light spine; anterior -margin seta 2 and seta 4 forming small, blunt, light 

 spines; seta 3 spine -shaped, short, transparent, yellowish; setae 5 and 6 

 thick, dark brown, situated close together lateral to median pit. 



(163) 



219 



FIGURES 277 -280. G ra m m o t a u 1 i us signa t i pennis McL.: 



277 - head, dorsal CA) and ventral (B); 278 - labrum; 279 - pronotum; 280 - prothoracic horn and 

 sternite. 



Mandibles black; teeth small, blunt, situated near apex; right mandible 

 with 5 teeth, ventral tooth larger than others; left mandible with 4 teeth, 

 2nd tooth from ventral margin larger than the others; median brushes forming 

 small tufts of 9—11 short, yellowish chaetae near dorsal margin. 



202 



