50 



Bnic/uis arciiarius W'olccjtt, type unique. April 9. 



Found on the sand between tufts of bunch-grass at the Devil's 

 Hole. (For description, see Wolcott, '12.) 



Bpitragus acutus Lee. July 22, 30, August 3, 12, 14, 18, 19, 20, 22. 



Found by Hart in various parts of the sand region, on flowers 

 of Cacalia atriplicifolia. No other Illinois record. This is a spe- 

 cies of western distribution. Not seen in 1910, although it has been 

 common in other years. The Tcnebriomdae reach their highest 

 development in the arid Southwest, where they are more abundant 

 than any other beetle family. They usually feed upon fungi, dead 

 wood, or other vegetable substances, a.nd may be considered as plant- 

 eaters or scavengers for the most part. 



Xylopiniis sapcrdioides Oliv. June 25, July 25. 



A common woodland species. Occurs especially under oak bark. 

 Found under logs at the Devil's Hole and the Devil's Neck ; and 

 under bark of black-oak log in the forest about three miles east of 

 Havana. 



Opatrinus notus Say. April 4, 7. 



Not infrequent in dry or sandy localities, under boards or other 

 cover. A typical blowsand species, found more commonly in bare 

 sand than in bunch-grass. Usually associated with Lacon rectangu- 

 laris. 



Blapstiniis intcrmptus Say. April 7. 



Found occasionally in sandy localities under rubbish. One speci- 

 men picked up on blowsand at the Devil's Neck. 



MordcUa umrginata Fab. ; Wolcott, det. July 23. 



The MordcUidae are small active beetles, found on flowers or 

 dead trees. The larvae live in old wood or inside the stems of plants, 

 and are thought to be predaceous upon the phytophagous larvae of 

 Lepidoptcra and Diptera which they find there. M. umrginata is 

 a common and generally distributed species, occurring on Corniis, 

 Ccanothus, and other plants. A species of clearings and forest mar- 

 gins. On PyciuDifheimiiii, near Matanzas Lake. 



Notoxus bifasciatus Lee. June 25, 28. 



The Anihicidac are small flower-beetles which resemble ants in 

 general appearance. This species is rather common at forest mar- 

 gins, usually found in flowers. Frequent in dry sand under a small 

 clump of walnut and coffee-trees. A number of lepidopterous pupce, 

 apparently Noctuidac in large part, were found in the same place. 



