86 CAIJFORNIA STATE COMMISSION OF HORTIC[JLTURE. 



sent to the Arizona desert. At night he was considerably pestered by- 

 gnats, but had no idea of the terrible danger to which he had been 

 exposed until a week later, when he was seized with dizziness. He was 

 taken to Needles, where it was discovered that the gnats had deposited 

 eggs in his nostrils and that they were hatching. The poor fellow was 

 brought here, where everything possible is being done to allay his 

 sufferings, but no hope is entertained for his recovery. This is the 

 second case of the kind treated here.'' 



The Diptera are divided into two suborders, the Orthorrhapha, in 

 which the insects make their escape from the pupa case either through 

 a T-shaped slit near the head, or in fewer species through a crosswise 

 slit between the seventh and eighth abdominal segments. The second 

 suborder is the Cyclorrhapha, in which the insect, after passing its meta- 

 morphosis, escapes from the pupa case through an opening made at the 

 head part of it. These two suborders are divided into families, accord- 

 ing to Comstock's classification, which we have adopted, as follows: 



Suborder ORTHORRHAPHA. 



1. Psychodidae, the Moth-like flies. 



2. Tipulidse, the Crane-flies. 



3. Blepharocerida?, the Net-winged Midges. 



4. Dixidaj, the Dixa-midges. 



5. Culicidfe, the Mosquitoes. 



6. Chironomidir, the Midges. 



7. Mycetophilida?, the Fungus-gnats. 



8. Ceciclomyiidse, the Gall-gnats. 



9. Rhyphida^, the False Crane-flies. 



10. Orphnephilida^, the Solitary-midge. 



11. Bibionidjfi, the March-flies. 



12. Simuliida, the Black-flies. 



13. Tabanida% the Horse-flies. 



14. Stratiomyiidse, the Soldier-flies. 



15. Leptida, the Snipe-flies (in part). 



16. Acrocerida, the Small-headed flies. 



17. Nemistrinidse, the Tangle-veined flies. 



18. Asilida, the Robber-flies. 



19. Midaida, the Midas-flies. 



20. Apioceridse, the Apiocerids. 



21. Bombylida, the Bee-flies. 



22. Therevida, the Stiletto-flies. 



23. Scenopinida, the Window-flies. 



24. Empidida', the Dance-flies. 



25. Dolichopodida, the Long-legged flies. 



26. Lonchopterida, the Spear-winged flies. 



