Distribution. European USSR, Caucasus, Altai. In addition, Europe, 

 Asia Minor, Iran. 



1. Gl3T)hotaelius pellucidus Retzius 



Degeer, 1778: Plate XI, Figures 9-11, Plate XII, Figures 13-18.- 

 Pictet, 1834:147, Plate VIII, Figure 4.- Struck, 1899:198-199, Figure 78; 

 1900: Figure 14. - Ostwald, 1901 :109.- Struck, 1903:86, Plate I, Figure 7.- 

 Ulmer, 1903:50, Figures 76, 126; 1 903b: 191-1 95, Figures 19-22.- Siltala, 

 1903a:9-ll, Figure 3; 1904c:32.- Ulmer, 1909:257, Figure 386.- Lestage, 

 1921 :712-722, Figure 247 e, i, k. - Hickin, 1946 :61-65, Figures 1-9. - 

 Lepneva, 1940:215. 



Full-grown larva. Length 20— 23 mm. Head (Figure 258) mainly light 

 brown: frontoclypeus with large, T-shaped, dark pattern, resembling that 

 of most species of Limnophilus, occupying anterior part of sclerite; 

 longitudinal stripe wider posteriorly, with dark, wedge-shaped pattern of 

 punctation; area around tentorial pits lateral to frontal suture light 

 yellowish, as is the narrow periocular area; groups of dots lateral to 

 coronal suture, on site of lateral stripes, and ventrally at occipital foramen. 

 Gula as in Figure 2 59. 



Dorsal sclerite of labrum (Figure 260) yellowish brown, with deep 

 median depression; lateral margin reddish brown; setae as in the other 

 species of Limnophilini; setae 5 and 6 large, black. 



Mandibles short, mainly black; teeth blunt, small, situated distally 

 (Figure 261 ). 



Pronotum (Figure 262) yellowish brown, its anterior third dark brown, 

 with blackish brown anterior margin; groove in anterior third not 

 dark in the middle; punctation black or blackish brown. Mesonotum 

 (Figure 262) yellowish brown, its dark punctation not uniformly distinct; 

 lateral margin with broad blackish brown part; posterior angles and 

 . j-j. posterior margin black. 



Legs yellowish brown; base of coxae and dorsal side of femora and 

 tibiae with dark punctation; chaetotaxy as inN.punctatoIineatus. 



Abdominal segment 1 with large dorsal and lateral processes; ventral 

 process low, elliptical; setae small, black. 



Lateral line on segments 3—8; hairs grayish black. Gills on 

 segments 2—7. 



Tergite of segment 9 brownish, with row of dark submarginal dots 

 anteriorly; setae as in Figure 263, 



Claw with a large dorsal denticle. 



Case as in N e m at o t au 1 iu s pun c t a t o 1 i n e at u s (Figure 264). 



Pupa. Length 19—21 mm. Antennae reaching end of segment 6 or 

 beginning of segment 7; scape almost twice as long as pedicel, both with 

 several short setae. Labrum, as in most species of Limnophilini, with 

 small, round, median process; seta 1 small, situated near anterior margin; 

 sides with 5 large, black, hooked setae. Distal part of mandibles wider 

 than in Nematotaulius punctatolineatus; median serration slight. 



192 



