290 
THE AMERICAN NATURALIST. 
[Vor. XXXIV. 
Besides the identical species of Baccharis and Atriplex, the 
Salt River Valley has another Baccharis and two other species 
of shrubby Atriplex not found in the Mesilla Valley. 
It seemed to me that the cottonwoods (Populus fremonti) of 
the Salt. River Valley were not perfectly identical with those 
of the Mesilla Valley, but the species is presumed to be the 
same. 
INSECTS. 
Colias eurytheme Boisd. 
Pyrameis cardui (L.). 
Lycena exilis Boisd. 
Libythea bachmani carinenta 
(Cram.). 
Synchloë lacinia Geyer (larvæ on 
Xanthium and sunflower). 
Heliothis armiger Hubn. (Buckeye). 
Asphondylia neomexicana (Ckll.). 
A, atriplicis (Towns).* 
Diplosis atriplicicola Ckll.* 
Chilocorus cacti (L.). 
Drosophila ampelophila Loew. 
pyramicus Rog. 
Hesperotettix viridis (Thos.). 
Spherophthalma  dona-ang | Ckll.. 
and Fox.* 
S. foxi Ckll. 
Coleophora suedicola Ckll. 
(Tempe).* 
Eromene (Euchromius)  ocellea 
Haw.) Zell. (Buckeye). 
Megilla maculata (De Geer). 
Aphalara suede, Schwarz. MS. 
(Tempe). 
Allorhina mutabilis Gory. 
Microcentrum retinervis Burm. 
Dicraneura cockerelli Gill.* 
Stictocephala festina Say. 
Eriococcus tinsleyt Ckll. (leaf-form).* 
Phenacoccus helianthi Ckll.* 
Calliopsis coloradensis coloratipes 
Perdita asteris Ckll.* 
P. salicis Ckll. 
Exomalopsis solani Ckll. (Tempe).* 
Agapostemon melliventris Cress. 
(Tempe). 
Halictus pseudotegularis Ckll. 
H. meliloti Ckll.* 
Prosapis mesille Ckll. * 
Mellisodes agilis Cress. 
Cockerellia albipennis helianthi 
* 
Aspidiotus juglans-regie albus 
Ckll.* 
Hormilia elegans Scudder.* 
The species and varieties marked with an asterisk were 
originally described from Mesilla Valley specimens. 
I have included some species found at Buckeye, as, although 
this is not actually in the Salt River Valley, it is virtually 
part of the same region. 
