Dec., '08] ENTOMOLOGICAL NEWS. 491 



threads were spun, then the insect went to the tip end, crawled 

 into the tube he had just formed, and began to bind the edges 

 together on the inside, at the petiole end, then returning to 

 the apical end, then worked at the middle, rested, and finally 

 spun in the open place near the mouth of the pocket. The sides 

 were noticeably drawn together as he worked near the middle 

 on the inside. Also, when the insect crawled over the first 

 work done, while still on the outside, the edges were squeezed 

 nearer together by the legs, and were held there, the threads 

 becoming more oblique. The whole process was finished 2 

 minutes before ten. After completing the pockets the insects 

 lie very quietly within them for hours. The work done by 

 these captive Camptonotus indicates that they have no choice 

 as to whether the mouth of the pouch shall be at the apex or 

 base of the leaf. Their adaptability is shown by the use of 

 a leaf weakened by injury, obviating the necessity of making a 

 cut, as well as in the recognition of the pod of Staphylea as a 

 handy substitute for a rolled leaf. 



Although three specimens of Camptonotus were confined 

 for two days with uninjured pods and no leaves, not a pod was 

 disturbed. Hence it is not proven that the locustids enter 

 them through openings of their own making. Nevertheless, 

 it is very probable that they do so; certainly they have mand- 

 ibles equal to the task. The pods may be used for only a 

 short period. At any rate, on August 23, not a Camptonotus 

 could be found where a week before they were numerous. How- 

 ever, on this date two specimens of Orocharis saltator Uhler, 

 were discovered in torn pods. Mated pairs and nymphs of 

 Banasa also were frequently found. 



EXPLANATION OF PLATE XXV. 



Top Figure: Leaflet of Staphylea trifoliata, rolled by Camptonotus 

 carolinensis. 



Middle and Bottom Figures: Pods of Staphylea, with walls of cell cut 

 away, showing Camptonotus, ensconced within. On upper left hand part 

 of middle figure, note well woven sheet closing the entrance to cell. 



MR. FORDYCE GRINNELL. JR., collected last summer in the San 

 Jacinto Mountains of southern California. Messrs. Grinnell and Brad- 

 ley made a collecting trip to the summit of Mount Wilson in September. 



