373 



Fig. 7. 



Oocles helopioides, 



Fabr. 



Nasale well deve- 

 loped, anterior bor- 

 der witli 5 denticles, 

 the niidde-tooth is 

 three-lobed. Area of 

 pharyngeal muscles 

 is a cross -shaped 

 elevation, with short 

 arms, in a cup-like 

 depression. Pars en 

 siformis very broad; 

 cerebral area very 



small. Mandible with crenulated border. Inner lobe distinct with a 



well developed terminal seta. 



Fig. 8. 



Blethisa multipunc- 



tata, L. 



Frontal suture is 

 divided into three 

 arches. Nasale well 

 developed; distinct 

 nasal back; anterior 



border triangular 

 with a projecting, 

 three-lobed middle 

 tooth, and 4,5 teeth 

 on each side. No 

 tentorial rib. The 

 dorsal articulation 

 of the mandible is 

 covered from above 

 by the antennalscle- 

 rit. Area of phar- 

 yngeal muscles without the arm portion. Cerebral area well deve- 

 loped, but extends only halfway to the anterior border of the ensiform 

 part. The maxillæ have a very small inner lobe with a laterally 

 placed seta. 



