60 BULLETIN 66, UNITED STATES NATIONAL MUSEUM. 



Fig. 2. — Diagram comparing nervous system of strepsiptera "with'that of other orders. 



1. Machilis maritima. 5. Empis stercorea. 9. Syrphus ribesii. 13. Melolontha vulgaris. 



2. Termes, species. 6. Tabanus bovinus. 10. Lucanus dama. 14. Stylops melittx. 



3. Chironomus plumosus. 7. Formica rufa. 11. Sarcophaga carnaria. 15-17. Xenos vesparum. 



4. Melanoplus spretus. 8. Acilius sulcatus. 12. Lachnosternafusca. 



(These figures are borrowed from Packard, Brauer, and Nassonow and for detailed information see list 

 of Illustrations.) 



