223 



Bloomington, 111. The beetles evidently hibernate, for I have taken 

 them at Urbana, 111., as late as October i8, and as early in the spring 

 as March 23. 



This beetle invades logs and stumps as soon as the sap-wood be- 

 gins to be well decayed, and evidently advances into the log with the 

 progress of decay. As it invades logs in the sap-wood stage of decay, 

 it is often associated with nezvly founded colonies of the ant Cam- 

 ponotus herculeanus pennsyhanictis, pyrochroid larvae, the slug Phil- 

 omycus carolinensis, and the caterpillar Scolecocampa liburna. For 

 physiological studies of cornutus see Schaf er ( Mich. Agr. Coll. Exper. 

 Sta., Tech. Bull. No. 11. 191 1). 



SCARABmiDM 



Geotrupes splendidus Fabr. Splendid Dung-beetle. 



This dung-beetle was dug from a hole, an inch or so below the 

 surface, in the hard clay of the pathway near the margin of the for- 

 est bordering the cleared area (Sta. IV, a) Aug. 22 (No. 120). As 

 cattle and horses were pastured in this forest, its presence is readily 

 accounted for. 



Felidnota punctata Linn. Spotted Grape Beetle. 



Only one specimen of this beetle was taken. It was found on a 

 grape leaf (Sta. Ill, b) Aug. 15 (No. 58). This insect is primarily 

 a forest or forest-margin insect. The larva feeds upon the decaying 

 roots and stumps of oak and hickory. The adult devours leaves of 

 the grape and of the Virginia creeper. 



Many undetermined scarabseid larvae were found in a much-de- 

 cayed stump in the ravine near the small temporary stream (near 

 Sta: IV, d) Aug. 22 (No. 130). 



Chrtsomelid^ 



Chrysochus auratus Fabr. Dogbane Beetle. 



This characteristic species of the prairie (No. 103) was taken 

 Aug. 20 in an open place in the upland oak-hickory forest (Sta. 

 IV, a) on the dogbane Apocynum medium. See list of prairie inver- 

 tebrates, p. 178. 



Cryptocephalus m-utabilis Mels. 



This leaf -beetle was taken June 28, 'I911, in the Bates woods 

 (Sta. IV) by T. L. Hankinson (No. 7678). It has been reported on 

 Ceanothus, Viburnum, hazel, and oak by J. B. Smith. Evidently this 

 is a woodland beetle. 



