Key to Species 

 Full-grown larva 



1 (2). Length 6.0— 6.2 mm. Pronotum dark brown, with more or less 



distinct dots laterally; tergites of meso- and metanotum dark 

 brown, with light dots, clearly differentiated; walls of larval case 



thick, built of coarse sand grains 



1. Agapetus fuscipes Curt. (p. 337) 



2 (l). Length 5.0— 5.5 mm. Pronotum without dots; tergites of meso- and 



metathorax thin and yellowish brown; walls of larval case not thick, 



sometimes loose, built of sand grains and small stones 



2. Agapetus comatus Pict. (p. 344, 



1. Agapetus fuscipes Curtis 



Klapalek, 1893:131-134, Figure 36.- Struck, 1900:28, Figures 44-45.- 

 Ulmer, 1903:130; 1909:222, 290.- Siltala, 1905:157-158.- Lestage, 1921: 

 426-429, Figure 136, d. - Nielsen, 1937:253-263; 1942:358-374, Figures 

 23-35.- Hickin, 1943:78-80, Figures 1-9. 



Full-grown larva (7th stage). Length at the end of the stage 6.25 mm, 

 width of head 0.48 mm; ratio of length of head, thorax and abdomen 

 10:34:87; larvae massive, width about 0.22 of length; greatest breadth 

 in the region of abdominal segment 4. Head (Figure 370) dark brown; 

 length, greatest width and height of head almost the same; mouthparts long 

 as in other species of Agapetus; eyes situated in anterior third of head, 

 on a wide, irregularly pear-shaped light area; antennae situated outside 

 the light area anterior to the eyes. Gular suture without bifurcation; gula 

 fused with pregula outside head capsule. Anterior angles of the wide 

 frontoclypeus slightly projecting beyond anterior margin of head; medio - 

 anal and intermediate setae of the 3 anterior -margin setae straight, 

 relatively long; lateral seta and anterior frontal seta curved and 

 recumbent; all 3 frontal setae situated close together, behind each other, 

 behind the lateral curvature; middle and posterior frontal setae projecting 

 and relatively long. Setae 7, 9, 14 and 15 dark, are among the longest setae 

 of the head; other dorsal setae small and light; setae 9 and 11 displaced 

 posteriorly to about the level of the middle of the eye; long seta 7 and short 

 seta 8 situated close to seta 10; seta 7 situated anteriorly and slightly 

 dorsally, seta 8 situated ventral to seta 7; setae 14 and 12 situated 

 immediately posterior to the eye on a light background; setae 15 and 16 

 situated on a dark background; seta 16 curved in the medioanal direction, 

 curved to the sclerite; ends of the setae meeting near the bifurcation of the 

 frontal sutures; ventral seta 18 retaining its original position, is short, 

 light, feathered and situated in about the middle of the head. 



Anteclypeus wide and light. Dorsal sclerite of labrum (Figure 37l) brown, 

 with a median process and lateral notches at the sides of the anterior 

 margin; light seta 1 concealed among the hairs; setae 4 situated on the 

 angles of the median process, light and long; other setae dark; seta 2 

 situated on a membrane; setae 5 and 6 long; seta 3 shorter, situated at the 

 margin; the median pit slightly displaced to the right. 



337 



