NO. 2192. DRA00NFLIE8, CALIFORNIA AND NEVADA—KENNEDY. 603 



OEOVILLE, BUTTE COUNTY, CALIFORNIA. 



Oroville is on the Feather River where it emerges from its canyon 

 in the Sierras. This is a barren, dry, hilly region where farming is 

 carried on by irrigation. It was on the irrigating and waste-water 

 ditches across the river from Oroville that the following species were 

 taken : 



1. HETAERINA AMERICANA (Fabricius). 



On irrigating ditch. Exuviae common. 



2. ARGU AGRIOroES Calvert. 



Several taken on irrigating stream. 



3. ARGIA EMMA Kennedy. 



One male taken on beach of Feather River. 



4. ARGIA VIVIDA Hagen. 



Abmidant on a spring streamlet on side of Table Moimtain. 



5. ENALLAGMA CARUNCULATUM Morse. 



Common. 



G. ENALLAGMA CYATHIGERUM (Charpentier). 



Occasional on the waste stream west of the Odd Fellows' Home. 



7. ISCHNURA PERPARVA Selys. 



Common. 



8. CELAENURA DENTICOLLIS (Burrneister). 



Several observed which were jn-obably this. 



9. OPHIOGOMPHUS BISON Selys. 



Two males taken. 



10. OPHIOGOMPHUS OCCIDENTIS CALlFORNICUS Kennedy. 



One male taken. 



11. ERPETOGOMPHUS COMPOSITUS Hagen. 



One female, a teneral, was taken on the irrigatmg ditch across the 

 river from Oroville. All the gomphines were taken on or near this 

 ditch. As this water came from a tributary of the Feather River, 

 probably the nymphs came down in the water. The Feather River 

 was high and no Odonata except the Argia were seen on its banks. 



12. GOMPHUS SOBRINIIS Selys. 



One male taken. 



13. ANAX JUNIUS (Drury). 



A pair were taken on the waste stream back of the Odd Fellows' 

 Home. 



14. AESHNA MULTICOLOR Hagen. 



Common. 



15. MACROMLi MAGNIFICA Mc Lachlan. 



Two males and several exuviae seen. 



16. LIBELLULA COMANCHE Calvert. 



A single male, the only specimen I have ever seen alive, was caught 

 while seated on the top of a weed near the waste stream. The fol- 



