58 



Sphaerophthahna chlaniydata Mel. July i, 8, 12, 29. 



Bare sand of marginal dune, blowsand at Devil's Neck and Dev- 

 il's Hole, in blowouts, and an interstitial species in the bunch-grass. 

 The commonest species of the Illinois River sand region. It has not 

 been taken elsewhere. 



Miitilla diibitata Smith; Skinner, det. October 6. 



Two females taken in a blowout, just at the tension line between 

 the basin and the blowsand, at the margin of the Cassia growth. 



il/vrf/z^ iiiterntpta Say. July 23, October 5. 



Taken on flowers of a white aster along roadsides. The females 

 were quite abundant. One male was taken at the border of the Matan- 

 zas Lake forest, on Pycnantheiiiitm. Not characteristic of sand. 



Hedychnini obsolctinii Say. October 7. 



One specimen taken on white aster. Hart took it at the Devil's 

 Neck and the Devil's Hole, in August. 



Odyiieriis fukipcs Sauss. ; Robertson, det. October 5. 



One specimen, from flowers of white aster growing along road- 

 side. Hart took three other species of this genus near Havana. 



Polistcs pallipcs St. Farg. October 5, 6. 



On aster along roadsides; in the Devil's Hole, according to 

 Hart, on Cassia. In the spring the nests of either Polistcs or Vespa 

 were seen in hollow logs along fences. This is one of the true social 

 wasps, which build paper combs. The larv?e are fed continually by 

 the adults, which are predaceous. Very common and generally dis- 

 tributed. 



Anoplius tropicus Fab. July 23. 



One specimen, from Pycnanthciiuiin at the margin of the Matan- 

 zas Lake forest. Hart found it common in many other parts of the 

 sand regions. He records ten species of Anoplius. The family, 

 Ceropalidac, includes digging species which prey upon insects and 

 spiders. Certain species are said to be guests in the nests of other 

 diggers. 



Anoplius luargiuatus Say. ; Robertson, det. July 3. 

 One specimen from a blow-out. 



Sphcx pictipcnnis Walsh; S. A. Rohwer, det. October 5. 



Taken on aster flowers along a sandy roadside. The Sphccidae 

 are powerful wasps which make underground cells, provisioning 

 them with caterpillars, spiders, or grasshoppers, which serve as food 

 for the larvae. 



