299 



1. Mystrophora altaica Martynov 

 Lepneva, 1949:167. 



Full-grown larva (Figure 343). Length 8— 9 mm. Sclerites shining and 

 dark; abdomen nearly cylindrical, slightly broader than the thorax. Head 

 uniformly chestnut brown (Figure 344), slightly lighter near the occipital 

 foramen and the coronal suture; gula small and triangular; gular suture 

 short and slightly longer than gula. Eyes situated on a light area; antennae 

 well developed, situated anterior to the eye; sensillae pale, with rounded 

 apex; median seta relatively long, directed inward, reaching the frontal 

 suture; second seta small. Frontoclypeus large, with a distinct posterior 

 row of dots on the exuviae; median anterior-margin seta shorter than the 

 others, light brown; intermediate seta dark brown, long; lateral seta at the 

 angle of the sclerite light, curved inward. All 3 frontal setae situated close 

 together; posterior frontal seta dark brown, thick, long and situated in the 

 posterior part of the sclerite; middle and anterior frontal setae situated 

 close together, at the curvature of the frontal sutures; the first short and 

 light; the second transparent and recumbent. Large dots lateral to the 

 epicranial suture and on the sides of the head are visible on the exuviae. 

 Setae present near the light periocalar area; seta 9 is the longest seta of 

 the head; it is situated together with the short light seta 11 anterior to the 

 curvature of the frontal suture, at the level of the middle of the eye; seta 7 

 is brown, strong, short and is situated posterior to the antennae, near the 

 anterior margin of the light periocular area; the small, light and spinelike 

 seta 8 is situated laterally, at the same level. The small yellowish seta 10 

 is situated lateral to eye and anteriorly; the small thin setae 12 and 13 are 

 situated behind each other posteriorly; seta 14 is situated slightly more 

 medially, the strong, moderately long, dark brown seta 15 is situated 

 posterior to the periocular area, at the level of the eye; two pits medial to 

 this seta; seta 16 is situated behind the posterior frontal seta, it is thin, 

 transparent, curved inward and recumbent; lateral to seta 16 is the small 

 seta 17; slightly posteriorly to this seta are 3 setules situated behind each 

 other. Ventral seta 18 small, situated lateral to the gular suture. Gula 

 small and triangular (Figure 345). 



FIGURE 343. Mystrophora altaica Mart. Full-grown larva, lateral 



324 



