16 PROCEEDINGS OF THE NATIONAL MUSEUM aht. 5 



however, Handlirsch has more recently published a genus Eoplecia, 

 in which the third vein of Williston (radical sector) emits two 

 branches above, one before, the other after, the anterior cross vein. 

 Thus it may be held that the second vein is actually absent in the 

 modern insect, and not represented by the upper branch of the 

 third. This view is further supported by the condition in the Ani- 

 sopodidae, in which the second vein arises before the cross vein, and 

 the third is without a fork. In such Diptera as the Leptidae, the 

 second vein arises as in Anisopodidae, but the third forks in a 

 manner analogous to that of Plecia. Brunetti, however, argues that 

 possibly it is the third vein which is absent in Bibionidae, and says : 



If we compare a wing of Culex with that of Plecia, and simply eliminate 

 the third vein from the former and lengthen the anterior cross vein, we get 

 an exact counterpart in the wing of the latter. 



EXPLANATION OF PLATES. 

 Plate 1. 



Fig. 1. Megachile amaguensis, new species, X 3>/^. 



2. Lavrushinia elegantula, new species, X 6. 



3. Philagra {?) kudiana, new species, X 3. 



4. Megacercopis optima, new species, X 2^2- 



5. Mundopoides cisthenaria, new species, X 3. 



6. Aphrophora protocalla, new species, X 2'^^. 



7. Anthonomus amaguensis, new species, X 6. 



8. Throscus (?) perittilus, new species, X 6. 



9. Limncphilus recuUus, new species, X 3. 



10. Patrobus (?) kudiensis, new species, X 6. 



11. Cleonus shareipoffi, new species, X 6. 



Plate 2. 



Fig. 12. Indusia comminuta, new species, X 6. 



13. Indusia seguoiac, new si>ecies, X 3. 



14. Amagupsyche perlata, new species, X 2. 



15. Plecia amagua, new species, X 6. 



16. Phryganea lavi-uschini, new species, X 2. 



17. Plecia ohsitulu, new species, X 6. 



18. Plecia kudiella, new species, X 6. 



19. Plecia kuznetzovi, new species, X 6. 



20. Plecia redempta, new species, X 6. 



21. Plecia rcfracta, new species, X 3. 



o 



