AEGERIADAE 



563 



2. Tongue rudimentary ; 7 of forewings to termeu 



1. AEGERIA. 

 developed ; 7 of forewings to apex 



2. TROCHILIUM. 



1. AEGERIA, F. 



Head shortly rough -haired above. Tongue rudimentary. 

 Antennae J, in $ lamellate. Labial palpi with second joint 

 rough-scaled beneath, terminal loosely scaled. Abdomen stout. 

 Forewings : 7 to termen. Hind wings : 3 and 4 stalked. 



A small genus, characteristic of the European region. The 

 images are seldom observed, though the larvae are common. 



Collar yellow ... 2. crabroniformis. 



dark fuscous . . . .1. apiformis. 



1. A. apiformis, Cl. 33-44 mm. Head yellow. Thorax 

 blackish, with a yellow patch on 

 each side anteriorly. Abdomen 

 black, with yellow bands except 

 on segment 3. Posterior legs 

 internally orange. Forewings 

 hyaline ; costal and dorsal streaks 

 and margins of cell ferruginous- 

 brown ; veins 2-8 dark fuscous; 

 cilia fuscous or dark fuscous. 

 Hindwings hyaline; veins and cilia 

 dark fuscous. 



Neuration of Aegeria apiformis. 



Britain to the Clyde, local ; Europe, Asia Minor, NW. Asia, 

 N. America; 6, 7. Larva ochreous-whitish ; head reddish- 

 brown; plate of 2 yellow - brownish : in trunk and roots of 

 poplar; 8-4, but sometimes living two years. 



2. A. crabroniformis, Lew. (bembectformis, Hb.) 31-44 mm. 

 Head and thorax dark fuscous, collar yellow. Abdomen with 

 four or more yellow bands. Forewings hyaline ; costa, base of 

 dorsum, and veins to end of cell ferruginous -orange, veins 

 posteriorly black; cilia dark fuscous. Hindwings hyaline; 

 veins and cilia dark fuscous. 



Britain to the Clyde, N. Ireland, local ; Holland, Germany ; 

 6, 7. Larva ochreous-whitish ; head reddish-brown ; plate of 2 

 yellow-brownish : in stems of Salix ; 8-6- 



2. TROCHILIUM, Sc. 



Head with appressed hairs. Tongue developed. Antennae 

 | -A, in ( sometimes subdentate, ciliated. Labial palpi with 



