3 (2). Dorsal side of head entirely dark chestnut brown; southwestern 



border region of the European USSR 



2. B. montanus Klap. (p. 472) 



4 (l). Case made of mineral or of plant and mineral particles; head 



blackish brown dorsally; mesonotum and metanotum with brownish 

 sclerites 3. B. caucasicus Mart. (p. 474) 



371 1. Brachycentrus subnubilus Curtis 



Pictet, 1834:180, Plate XIV, Figure 4.- Eaton, 1867:399, Figures 7, 8.- 

 McLachlan, 1872:166; 1874:257-259.- Ulmer, 1903:87, Figures 6,17,28,57, 

 97, 113; 1903c:346-347.- Siltala, 1905:21-26, Figure 6.- Ulmer, 1909: 

 275-278, Figures 412, a, f, h, g, i. - Lestage, 1921:862-872, Figures 309, f-i, 

 310, A, 311, 312, A.- Lepneva, 1940:217-218, Figure 161.- Hickin, 1943:81-83, 

 Figures 1-10.- Brindle, 1964:197, Figure 8. 



Full-grown larva. Head slightly oblong, ground color light yellow; 



pattern distinct, chestnut brown (Figure 627, A). Frontoclypeus large, long, 



narrower posteriorly; anterior part with 

 indistinct, longitudinal, median stripe with 

 2 large, light dots and 2 less distinct dots; 

 posterior part mainly chestnut brown, with 

 a wedge-shaped pattern of 8—10 light yellow 

 dots, 2 similar dots lateral to pattern; 

 posterior angle light. Frontal sutures 

 laterally with dorsal stripes, which are 

 indistinct, pale brownish anteriorly, wider 

 posteriorly from eye to seta 17, distinct, 

 chestnut brown, with 3 pairs of transversely 

 fused, large, light dots; a lighter area near 

 fork of frontal sutures; area near occipital 

 foramen dark brown dorsally and laterally, 

 with small, round, light dots; ventral side 

 chestnut brown, lateral to gular suture and 

 posteriorly with numerous indistinct dots; 

 broad, blackish brown stripes, tapering 

 posteriorly, along the gular suture. Gula 

 oblong-trapezoidal, dark chestnut brown, 

 narrower posteriorly; pregula in form of a 

 narrow, yellowish brown, transverse stripe 

 (Figure 627, B). 



Median and intermediate, anterior- 

 margin setae light brown, moderately long, 

 latter slightly larger than former, lateral 

 anterior-margin seta large, almost as large 

 as median, curved inward; anterior frontal 



seta similar, procumbent; intermediate frontal seta small, light, thin; 



posterior frontal seta larger, light brown, situated near intermediate seta. 



Seta 7 moderately long, light brown, thinner than anterior-margin setae, 



situated ventral to antenna and at its level; seta 9 moderately long, dark 



FIGURE 627. Brachycentrus subnubi- 

 lus Curt. Head, dorsal (A), gula (B) 



464 



