3° CONNECTICUT GEOL. AND NAT. HIST. SURVEY [BuU. 



Fig. 7. Labia of nymphs. — l. Cordulegaster sp. 2. Basiaeschna Janata 

 labial palpus. 3. Gomphtcs sp., palpus and distal margin of mentum. 4. 

 Lestes vigilax, labium. 5. Aeshna umbrosa, palpus. 6. Boyeria vinosa, 

 palpus and distal margin of mentum. 7. Basiaeschna Janata, distal margin 

 of mentum. 8. Leucorrhinia intacta, palpus. 9. Didymops transversa. 10. 

 Agrion maculatum, labium. 



