Key to Species 

 Full-grown larva 



1 (4). Dorsal side of head with light, distinct dots in sharp contrast to dark 



background. 



2 (3). Dots lateral to coronal suture transverse; gula dark only anteriorly 



anteriorly 2. S. personatum Spence (p. 681) 



3 (2). Dots lateral to coronal suture mainly round; gula entirely dark 



1. S. pedemontanum McL. (p. 673) 



4 (1). Dorsal side of head with dark dots, less distinct 



3. S. grusiense Mart. (p. 684) 



1. Sericostoma pedemontanum McLachlan 



Pictet, 1834:176. Plate XIV, Figure I.- Kolenati, 1848:90.- Klapalek, 

 1893:39-43, Figure 11.- Struck, 1900: Figure 27.- Ulmer, 1903:80; 

 1909:280. 321.- Lestage. 1921 :923-931. Figures 328e, 329 B, 330 A.- 

 Nielsen. 1942:428-450, Figures 77-92. 



Full-grown larva (Stage 7). Length 11.0-16.2 mm (Figure 862). Head 

 broad, oval (Figure 863, A), slightly longer than wide, mainly brownish, 

 with light dots; eyes on light background; antennae situated at anterior 

 margin, sensilla dark, with one seta. Frontoclypeus narrow, oblong; 

 anterior part larger than posterior part; posterior angle with 2 large, 

 light dots and several small, indistinct dots. A longitudinal ridge extending 

 lateral to frontal sutures between eye and margin of head, dorsal to eye. 

 Dorsal and lateral stripes absent; dorsal stripes replaced by large, light, 

 transverse dots along posterior branch of frontal suture; light, oblong 

 and round, smaller dots lateral to coronal suture and on site of lateral 

 stripes; ventral surface mainly mat, white or yellowish; gular suture 

 absent. Gula cup-shaped, dark, fused with large, lateral sclerites (Figure 

 863. b); gula distinct. 



Anterior setae of frontoclypeus situated in angle; median and 

 intermediate setae dark, moderately long, the latter longer; lateral seta 

 light, curved inward, procumbent, moderately long; anterior frontal seta 

 the same; intermediate frontal setae strong, thin, long, situated near tentorial 

 pit; posterior frontal setae small. 



Seta 7 situated near anterior margin ventral to ridge and antenna. Seta 

 9 situated close to anterior margin of eye dorsal to ridge; seta 11 small, 

 situated behind 9; seta 10 small, light, situated before eye; seta 14 situated 

 behind eye dorsal to ridge; seta 12 situated slightly more ventral, 

 immediately behind eye. relatively large; seta 13 small, slightly medial 

 to 14; seta 15 thin, situated directly behind 13; seta 16 short, dark, situated 

 behind 13; seta 17 situated before fork near frontal suture, small, thin. 

 Ventral side: seta 8 small, situated at anterior margin; seta 18 small, 

 situated at level of posterior margin of gula. Occipital foramen with a 

 black line at margin. 



673 



