ZOOLOGY 103 



The horned toads bring forth their young alive. One that 

 was kept in the writer's laboratory gave birth to twenty- 

 nine one night. The young ones left their mother at once 

 and scattered and when caught and confined together they 

 showed no signs of any instinctive regard for each other. 

 The female however made no attempt to eat her young even 

 when provided with no other food. 



After a rain the temporary pools here and on the mesa 

 are occupied by hordes of small frogs * 'peepers" which breed 

 here with extreme rapidity. It is seldom that these ponds 

 last more than a week or two and yet in this short time many 

 seem able to complete their metamorphosis. These extreme- 

 ly temporary ponds may also be occupied by a species of 

 Apns, a crustacean. 



CROTON DALEA SCOPARIA SOCIETY 



Dactylotum pictum, horn. Thetricolored Grasshopper, or, 

 as it was aptly named by one of my students, "The Barber- 

 pole Grasshopper," occurs wherever its foodplant Croton 

 texensis occurs in sufficient abundance. 



We have never noticed it eating any other plant and have 

 never found it in situations where there was not a good deal 

 of Croton, so it seems entirely probable that it recognizes no 

 other plant as proper food. Nearly full-grown nymphs were 

 found hibernating under Yucca stems. The adult has very 

 short wings which are useless for purposes of flight. 



Anthonomus albipilosus, Dtz. Eats out the center of the 

 seeds of Croton texensis, one in each seed. 



* Bruchus perplexus. Common here on Croton. Also 

 found on Tamarix, Phacelia corruga, Fallugia. and Ninebark 

 in the Pine Ass'n. 



Cleonus (Cleonopsis) pulverens, Lee. 



Europiella stigmosa (Uhl) Rent. On the blossoms of the 

 Dalea. 



Lygaeus pyrrhopterus, Stal. Specially abundant here but 

 generally over the whole Sonoran. 



Stagmomantis Carolina. L. Sonoran generally but com- 

 mon here. 



Bacillus carinatus and. 



Diapheromera femorata, are the "Camponoche" of the na- 



