33 



vertical for most of its length, opens obliquely at the top into the 

 side of a pit, which serves to keep the drifting sand out of the bur- 

 row proper, and also as a pitfall for small animals. It is admirably 

 adapted to the looseness of the material. The mouth of the burrow 

 is kept open by cementing its wall with saliva. Similar adaptations 

 must be present in the burrows of other small sand animals; at any 

 rate they do not often cave in, though perfectly dry at the opening. 

 The species has been reported from Kansas, Texas, Colorado, Illi- 

 nois, and Indiana. Locally it is found in almost pure dry sand in 

 which sparse vegetation grows. In the Devil's Hole it is perhaps 

 equally common in bunch-grass and blowsand. In the bunch-grass 

 it is an "interstitial'' animal. It is a dominant species, one of the 

 most powerful insects in bunch-grass and blowsand, and the com- 

 monest species of its genus in the Havana region. A typical mem- 

 ber of the bunch-grass and blowsand associations. 



Cicindcla 12-giittafa Dej. April 9. 



One specimen was taken from a small blowout at the Devil's 

 Hole. Hart took one specimen in a blowout at Moline. Larval bur- 

 rows usually occur in humus or clay, so that the presence of this 

 species in the sand is more or less unusual. It probably ranges over 

 all of the United States east of the Rocky Mountains'. 



Cicindcla 12-guttata rcpanda Dej. June 27, July 11. 



This form is found along sandy shores of rivers and lakes. Taken 

 at the Quiver Lake beach above Havana and at Matanzas Lake. The 

 larval burrows are found in moist depressions in sand with a small 

 humus content. The adults are found in dry sand, however; Hart 

 took one specimen at Moline, in a blowout on a sand hill, and Knaus 

 records the species from the Arkansas River dunes. It occurs in 

 Canada and in the United States as far west as Kansas and Colorado, 

 and northwest as far as Alanitoba. 

 Cicindcla tranqiicbarica Hbst. August 30, September 8. 



A large species, with much narrower elytral markings than C. 

 formusa gcnerosa. Three species were taken by Hart at Moline and 

 Meredosia, in the sand. Knaus records C. tranqueharica {C. vulgaris 

 Say) from the sand dunes of the Arkansas River in Kansas. It 

 probably occurs occasionally in the sand dunes of the Havana area. 

 The larval burrows occur in moist sand which has a little humus 

 intermixed. The species ranges over practically all of the United 

 States and southern Canada. 



Cicindcla scutcllaris Iccontci Hald. June 28, October 6, April 9. 



The food, habits, and life history of this species are similar to 

 those of other species of the genus. The geographic range is West- 



