An associational study of Illinois sand prairie . by whichthey are overwhelmingly subordinated in black-soil prairie. Cicindela formosa generosa Dej. Ju^e 25, July 12,16,22, October 6 This large species lays eggs in May and June. The generationlasts two years as described in the generic discussion. The burrow, vertical for most of its length, opens obliquely atthe top into the side of a pit, which serves to keep the driftingsand out of the burrow proper, and also as a pitfall for small ani-mals. It is admirably adapted to the looseness of the material. Themouth of the burrow is kept open by ce
An associational study of Illinois sand prairie . by whichthey are overwhelmingly subordinated in black-soil prairie. Cicindela formosa generosa Dej. Ju^e 25, July 12,16,22, October 6 This large species lays eggs in May and June. The generationlasts two years as described in the generic discussion. The burrow, vertical for most of its length, opens obliquely atthe top into the side of a pit, which serves to keep the driftingsand out of the burrow proper, and also as a pitfall for small ani-mals. It is admirably adapted to the looseness of the material. Themouth of the burrow is kept open by cementing its v/alls with adaptations must be present in the burrows of other smallsand animals; at any rate they do not often cave in, though perfectlydry at the opening. Distribution: Kansas, Texas, Colorado, and Nebraska. The east-ern extension of the plains in Illinois is not given by Leng (1902:136). Locally it is found in almost pure dry sand in which sparse ve-getation grows. In the Devils Hole it is perhaps equally common in. 110 an in- bunch-grass and blow-sand. In tho bunch-grass it is probablyterstitial animal. It is a dominant specios, one of the most powerful insects inbunch-grass and blow-sand, and the commonest species of the genus inthe Havana region. A typical member of the bunch-grass and blow-sandassociations. Cicindela duodecim-guttata Dej. April 9. One specimen was taken from a small blow-out at the Devils HoleHart took one specimen in a blowout at Moline. Larval burrows usuallyoccur in humus or clay, so that the presence of this species in thesand is more or less unusual. It ranges over probably all of theUnited States east of the Rocky Mountains. Cicindela duodecim-guttata repanda Dej. June 27, July 11. This form is found along sandy shores of rivers and lakes. Takenat the Quiver Lake beach above Havana and at Matanzas Lake. The lar-val burrows are found in moist depressions in sand with a small humuscontent. The adults are found in dry sand,
Size: 1332px × 1875px
Photo credit: © The Reading Room / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1900, bookdecade1910, bookidassocia, booksubjecttheses
