720 PROCEEDINGS OF THE NATIONAL MUSEUM. vol. xxvii. 



Plate XLlll. 



Fig. 1. Labium nf nymiih of GompltuiJes stigntdtus. 



2. Labium of nymph of Gomphus minutus. 



3. Labium of nymph of Gomphus confraternus.^ 



4. Labium of nymph of Gomphus sohrinus? 



5. Labium of nymph of Drogomphus spoliatus. 



6. Labium of nymph of .Eschna galapagoeiisia. 



7. Lateral lobe of labium of nymph of Arcltilestc.'f gnindis. 



8. Labium of nymph of Ilyponeura lugens. 



9. Labium of nymph of Argia fiimipennis. 



10. Inner view of lateral lobe of the same. 



11. Labium of nymph of Acanlhagrion cheliferum. 



12. Inner view of lateral lobe of the same. 



13. Labium of Tdugrion iheckii/ 



Pl.\te XLIV. 



Fig. 1. The wings of Tritheniis aurora f. 



2. The wings of Trilhemis minuscula. 



3. The wings of BIplacodes trivialh. 



