57 



Formica paUidc-fiiha schaiifiissi Mayr; M. C. Tanqnary, det. 

 April 4, 8. 

 This large ant is very active. Found commonly in bunch-grass 

 and under logs. One nest, in which a specimen of Histcr biplagiatus 

 was taken, was found in the roof of a mole tunnel. 



LO'Sius tiigcr auicricamis Linn.; Tanqnary, det. April i, 8. 



Common in the sandy loam flats, but rare in pure sand and in the 

 bunch-grass. Associated with cultivated crops, particularly corn. 

 Apparently restricted to soil of considerable humus content. 



Lcptothorax sp. (indeterminable). April 8. 



A single specimen, from pocket-gopher hill at the Devil's Hole. 



Phcidolc linclaudica Forel. April i, 7, 8. 



The determination was made by ]\Ir. Tanqnary and verified by 

 Dr. \Miecler. The genus is characteristic of sand habitats. Com- 

 mon under boards in bunch-grass. There are two kinds of work- 

 ers — major and minor. An elaterid, Cardiophorus cardisce, was 

 taken from one nest. Other nests were taken in the hills of pocket- 

 gophers. Not recorded from any other region of the state. 



Monoinoriiiui iiiiiiimiun Buckley; Tanqnary, det. April i. 



A rather common sand species. Taken under log near Devil's 

 Hole. 



SpJiacropJithahiia occidentalis Linn. July 21, 29. 



Taken on bare sand of marginal dune and on blowsand at the 

 Devil's Hole. A large, rather common, species. The Mutillidae are 

 terricolous, running about on the bare sand. 



Sphacroplithahna vesta Cresson; Henry Skinner, det. June 28. 



From bare sand in sparse bunch-grass at the Devil's Hole. This 

 species was taken by Hart near Havana August 20. No other Illi- 

 nois records. 



Sphaerophthahna fcrrugata Fab. June 28, July 19. 



Occurs regularly in blowsand and as an interstitial in bunch- 

 grass. The mutillid females run about on the bare sand; the males 

 fly to and fro a few inches from the ground. They are solitary in 

 habit. The species dig burrows in the sand, some storing food for 

 their larva?, ''while others seem to be parasitic or guests in the nests 

 and cells of bees and wasps" (J. B. Smith). This species is rather 

 common and widely distributed, but is restricted to very dry or sandy 

 localities. 



