MINUTE HYMENOPTEROUS INSECTS. 593 



that they consist only of four joints (I. c), and hence the genus is placed by that author in 

 the section Tetrastichoida;. The wings, however, are very strongly ciliated ; and notwith- 

 standing the difference in the number of joints of the tarsi, I should be inclined to place 

 the genus near PteropMx, "Westw. (unnecessarily altered to Pterothrix by Eoerster), and 

 not far removed from the Tricho£?rammatini. 



EXPLANATION OF PLATE LXXIII. 



The whole of these figures are highly magnified. 



Fig. 1. Antenna of the male of Valkerella (Polynema) natans. 



2. Tarsus of the fore leg of the same species. 



3. Mymar pulchellus, male. 



4. Mymar taprobanicus, male. 



5. Tibia and tarsus of the same insect. 



6. Mymar taprobanicus, female. 



7. Hooklets of -wings of this species, necessarily represented much too coarse. 



8. Mymar Wollastonii, male. 



9. Mymar Wollastonii, female. 



10. Alaptus excisus, male. 



11. Alaptus excisus, female. 



12. Antenna of Trichogramma evanescens. 



13. Fore wing of the same species. 



14. Oligosita subfasciata. 



15 to 19. Parts of the same insect : fig. 15, antenna; fig. 16, the mandible; fig. 17, maxilla; 

 fig. 18, labium; and fig. 19, the tarsus. 



20. Oligosita Staniforthii, female. 



21. Extremity of ovipositor of the same insect. 



22. Oligosita ? nodicornis, male. 



23. Antenna of 0. nodicornis <J . 



24. Trichogramma (Aprobosca) erosicornis. 



25. Antenna of the same species. 



