5. Potamophylax excisus Martynov^ larva nova * 

 Martynov, 1926:46-47. 



Full-grown larva. Frontoclypeus light brownish; dots small, not always 

 distinct (Figure ^73, A); 3 dots near median pit, 2 dots behind it and 

 medially; area of tentorial pit brown; dots wedge-shaped pattern and 

 distinct. A wide, brown stripe along epicranial suture, lateral to sclerite, 

 beginning at anterior margin; occipital foramen surrounded dorsally and 

 laterally by a dark, chestnut brown band (Figure 473, C); other part of 

 dorsal surface, entire lateral, and most of ventral surface light; transverse 

 rows of dark dots on area of dorsal stripes; longitudinal rows of dots, 

 some of them light, replacing lateral stripes; ventral side (Figure 473, B) 

 with a group of indistinct dots near occipital foramen, a row of 3 dark, 

 oblong dots which form characteristic, narrow, naedian striation anterior 

 to this group. Dark dorsolateral "collar" around occipital foramen is a 

 specific character. 



Labrum (Figure 474) reddish brov/n, darker than frontoclypeus; 

 posterior-angle sclerites short, blackish. 



Mandibles black, with blunt, short teeth; dorsal blade of left mandible 

 with a median tooth, a large tooth, 2 small pointed processes, and a small, 

 barely distinguishable, tooth; ventral blade of left mandible with one tooth; 

 right mandible with 2 distal teeth of about the same size, 2 small teeth 

 further dorsally; lateral setae light brown, ventral seta lighter and shorter 

 than dorsal. 



Sclerites of cardo reddish brown, with narrow, black stripes. Submentum 

 and stipes brown. 



Pronotum (Figure 475, A) light yellow, brownish at posterior margin; 

 anterior margin wide, brick brown; lateral margin pale yellow; groove 

 in anterior third dark brown in middle; punctation as in Figure 475, A; 

 posterior margin brownish, with large, posterior- angle processes, with 

 narrow, reddish brown lateral margin; black transverse stripes wide, 

 lateral stripe sometimes extending almost to suture in form of a narrow 

 _„„ process before median stripe, fused with it in some places. 



Mesonotum (Figure 475, B) whitish yellow, lighter than pronotum; 

 posterior angles whitish; oblique striation fine, reddish brown; anterior 

 margin light brown, slightly reddish laterally; posterior margin reddish 

 brown in middle, whitish yellow laterally; lateral margin broadly black 

 almost from anterior angle and including posterior angle. 



Propleuron with reddish black pleural suture; epimeron brownish 

 yellow, with narrow, reddish brown margin. Pleurites of meso- and 



The material from which A. V. Martynov described the species Stenophylax excisus sp. n., 

 labeled "Sukhumi Military Road, near Lake Kara-Kel", 3 August 1925, 2 pupae, collection of D. A. 

 Tarnogradskii" contains a male and a female pupa. Almost complete larval exuviae were present in 

 the male pupa case, and the genitalia were well preserved. Such exuviae, characterized by the 

 presence of a wide, dark band around the occipital foramen, are also known from other localities, 

 e. g., Station 259, Collection 366, Teberda, 13 August 1954, Mukhu River near the mouth, 3 pupae, 

 collected by E. A. Tetyueva. Similar exuviae were also found in pupal cases labeled "Station 198, 

 Collection 294, Teberda, 5 July 1954, a brook joining Amanauza River, depth 0. 09— 0.20 m, stones, 

 7° , 2 pupae, male and female, collected by E. A. Tetyueva." The male pupa of this sample contained 

 well developed genitalia. Some information on the pupa is found in Martynov (1926: 46—47). 



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