48 PROCEEDINGS OF THE NATIONAL MUSEUM. vol.65. 



of fronto-clypeo-labral area, 2.2 to 2.4 mm., width, 2.2 to 2.4 mm. ; 

 length of pronotum, 2.4 to 2.7 mm. ; width, 3.6 to 4.2 mm. 



The larvae of this species are similar to those of Cincindela for- 

 mosa but can be distinguished from them by the smaller average 

 width of the pronotum, the lack of a color pattern on the pronotum 

 and the presence of three setae on the median hooks. 



The adults emerge from hibernation in April or May and lay eggs 

 in May or June in sandy soil which is slightly shifting. The eggs 

 hatch in June and the larvae reach the third instar by the latter 

 part of August or the first of September. They close their bur- 

 rows the latter part of September or the first of October and go 

 into hibernation, appearing again in the spring. Pupation takes 

 place in June or July and some of the adults emerge from the pupal 

 chamber during the summer while the remainder stay in the pupal 

 chamber until the following spring. The adults appear in April 

 or May, become sexually mature in about a month, lay eggs, and die. 



The larvae of this species are very noticeable because of their 

 peculiar burrows. The main part of the burrow is from 12 to 20 

 inches deep and vertical throughout the greater part of its course. 

 About two-thirds of an inch from the top the burrow curves sharply 

 to a horizontal position and opens into a small pit. This construc- 

 tion serves to keep the sand, which is always slightly shifting, from 

 filling up the l)urrow and also serves as a trap for catching insects. 

 The larva cements the sand immediately around the opening with 

 saliva which keeps it from caving in. The pupal chamber is an 

 oblique side cavity about 4 inches below the surface. The upper 

 part and much of the lower part of the burrow is filled with sand 

 which is taken from the cavity. 



Larvae were collected along the sand dunes of Lake Michigan, 

 near Chicago, on the leeward side of the first ridge Avhere the bunch 

 grass has come in and the cottonwoods are old with occasional seed- 

 ings of pine. They reacli their greatest abundance among the young 

 pines but rarely invade the denser growths. 



CICINDELA SCUTELLARIS LECONTEI Haldemaii. 



Figs. 75, 112, and 143. 



Shelford, reared, larvae in the collection of the University of Illinois, the 



U. S. National Museum and the authoi-'s collection. 

 1908, Shelford, Journ. Linn. Soc. Lond., Zool., vol. 30, p. 172. 



Color. — Head and pronotum purplish bronze with a green reflec- 

 tion; setae on dorsal aspect of head and pronotum white, the other 

 setae brown. 



Head. — Setae on dorsal aspect long, stout, and prominent; di- 

 ameter of ocellus 2 equal to the distance between ocelli 1 and 2; 



