FIGURES 325-329. Philocrena trialetica Lepn.: 



325 - head, dorsal; 326 — chetoids near seta 16; 327 — labrum; 328 - mandibles, dorsal: 

 left mandible (A), right mandible (B); 329 — anterior margin of head, ventral; gula.pregula 

 and maxillolabium. 



Dorsal sclerite of labrum (Figure 327) golden yellow, brownish 

 posteriorly; outer membranous border of the labium with dense whitish 

 hairs; the light, curved seta 1 is situated among these hairs; the small 

 seta 4 is situated in a median depression on the margin of the sclerite;; 

 seta 2 situated on a membrane near the margin of the sclerite, dark brown 

 and slightly curved; seta 5 is the same; the light, inward-curved but not 

 recumbent seta 3 is situated slightly posteriorly on the membrane; seta 6 

 situated more toward the middle. 



Mandibles (Figure 328) short and yellowish, with dark ends; the apex of 

 the left mandible, in addition to the apical tooth, with a projecting large 

 subapical tooth of the reduced upper blade; serrated section with small 

 toothlike processes at the sides. Right mandible bifid at the end; upper 

 tooth shorter than the lower; lower blade with a large blunt basal tooth; 



310 



