72 



AKTICLE IV.— ON SOME CLOVER INSECTS. 



1. Cymatophora crepuscularia, Tr. 

 Order Lepidopteea. Family Phaljenid^. 



(Plate VI. Fig. 5.) 



Larvae from which the above was bred were taken on white clover 

 at Normal, June 21, the imagos emerging July 10. The larvae were 

 an inch long, slender, with only four prolegs. The head is widely 

 bilobed and reddish brown above, yellowish varied with reddish 

 brown in front, with two small approximate black spots on the mid- 

 dle of the front. The body is green, thickly covered with white 

 granulations, with some black ones intermixed, and has an obscure 

 reddish dorsal stripe. The posterior margins of the middle segments 

 are narrowly bordered with yellow. On the penultimate segment is 

 a large transverse blackish spot, with two small kidney-shaped yel- 

 low spots near its middle, approaching each other posteriorly. The 

 legs are pale brown, blackish at base ; prolegs pale brown, blackish 

 at base; prolegs black without, pale within; spiracles brown. 



The same larva occurred in our collections on the rose and the 

 common locust ; taken from the former June 20, and from the latter 

 July 4. We also collected it July 25, from the box elder {Ncgundo 

 aceroides), the specimen pupating August 4, and emerging August 13. 



2. The Clovek Bark Louse. 



{Coccus trifolii, n. s.) 



Order Hemiptera. Family CocciDiE. 



(Plate YI. Fig. 6.) 



On the 3d of May, at Normal, there occurred on the roots of 

 white clover examples of a root coccid, resembling Rhizobius in gen- 

 eral appearance, but differing from it in the antenniP, and especially 

 in the tarsi and tarsal claw. They were protected by a small yel- 

 low ant, Lasius flavus, in whose nests they occurred, and were 

 carried away by them like plant lice, when the nest was exposed. 



