Pupa 



1 (2). Gills with several filaments; case made of sand grains, rarely of 



secretion, curved, short in some species, flat vent rally, with strongly 

 convex dorsal side 1. Athripsodes Billb. (p. 542) 



2 (1). Gills single or absent; cases made in varying form, of mineral or 



plant particles. 



3 (4). Case straight, slightly tapering posteriorly, made of detritus or of 



detritus and sand grains 3. Mystacides Berth, (p. 579) 



4 (3). Case different. 



5 (8). Case made of small, usually fresh, plant fragments of symmetrical 



form, long, usually arranged in rows. 



6 (7). Gills present; case long, in form of a narrow cone, covering 



fragments arranged in a spiral 4. Triaenodes McL. (p. 500) 



7 (6). Gills absent, case nearly cylindrical; covering fragments forming 



a regular sequence of distinct oblique rows 



5. Erotesis McL. (p. 611 ) 



433 8 (o). Case made of secretion or sand grains, rarely of plant fragments, 

 fragments of irregular form and irregularly arranged, 

 9 (10). Case made of secretion 6. Leptocerus Leach (p. 613) 



10 (9), Case made of sand grains. 



11 (12). Case curved, markedly narrower posteriorly; covering sand grains 



very fine, smoothly arranged on thick-walled tube of secretion . . 

 7. Adicella McL. (p. 622) 



12 (11). Case short, slightly curved, with flat ventral side, made of sand 



grains, which are coarser laterally, rarely plant fragments instead of 

 sand 8. Oecetis McL. (p. 624) 



1. Genus At h r ip s od e s Billberg (L e pt o c e r u s auctorum, nee Leach)* 



Full-grown larva. Length 8.0— 14.0 mm. Head slightly oblong or wide; 

 light lateral stripe present; adfrontalband also present in some species; fronto- 

 clypeus long; gula triangular or wide, cup- shaped, with rounded sides. 

 Pattern of head and thoracic tergites distinct and variegated or pale and 

 indistinct; sometiraes absent. 



Submentum in form of a thin, pale, heart-shaped sclerite, with tuberculate 

 surface in some species. 



Mesothorax sclerotized only in middle; mesonotum distinct and with dark 

 pattern in some species, indistinct, with pale dots or without pattern in other 

 cases; posterior angles always with coarse, black or reddish black, oblique 

 streaks or bracket-shaped stripes. 



Metathorax almost twice as wide as mesothorax, with lateral processes 

 projecting anteriorly; metanotum membranous. 



Propleuron with large lobed or conical trochantin with pointed apex; 

 metapleuron situated at lateral process, almost twice as long as mesopleuron. 



Legs usually yellow, with dark articulation between coxae and femora; 

 hind tibia and tarsus not divided. 



* See Kimmins, 1949:201,202. 



542 



