626 PROCEEDINGS OF THE NATIONAL MUSEUM. vol. 57. 



MONOPHTLLA TERMINATA Say. 



Is a predator on borers in dead decidous trees and seasoned wood. 

 The adults are to a great extent nocturnal in habits, hiding during 

 the daytime in crevices and beneath the bark. 



There is a great variety of hosts, but it appears to be most plenti- 

 ful in dry wood attacked by Sinoxylon. 



It has been reared from Celastrus scandens infested by small 

 Cerambycidae ; wild grape infested by Phymatodes arnoenus; Dio- 

 spyros virginiana infested by Sinoxylon; hickory infested by Sinoxy- 

 lon., Lyctus and other borers; sassafras with Ptinid; ashboard in- 

 fested by Lyctus; Celtis infested with Scolytus muticu^; also oak, 

 honey locust, mesquite, and probably most any hardwood. 



The adults fly May and June-. 



The species occurs throughout the Eastern, Central, South, and 

 Southwestern United States. 



Observations by Hopkins, Fiske, Van Horn, Kirk, Chrisman.; 



Champlain. 



Genus CYMATODERA Gray. 



The adults of this genus are to a great extent nocturnal. They 

 are attracted by strong light, may be found at arc lights or taken 

 in trap lanterns. 



The seasonal histories of the different species studied are very 

 similar. The larvae are predators on the larvae of secondary wood- 

 borers, principally Cerambycidae and Buprestidae. They tunnel 

 through the sawdust-packed mines of the woodborers, feeding on the 

 woodboring larvae or pupae and finally utilizing their mines or cells 

 as pupal cells of their own. 



They do not line their cells as heavily as do the Enoclerus but all 

 soft particles are held together with interior smooth and ends sealed 

 with the exudation that is common to them for this purpose. 



CYMATODERA BRUNNEA Melsh. 



Adults active during July in Pennsylvania. Champlain. 



CYMATODERA BICOLOR Say. 



Is a predator in the larval stage on the larvae and pupae of sec- 

 ondary woodborers. It overwinters in the larval and pupal stages. 

 Adults active during May, June, July; habits retiring, nocturnal; 

 are attracted to lights ; mate and oviposit at night. 



Larvae are found in the galleries or mines of host. At Lyme, 

 Connecticut, they occur in dead dry dogwood {Gornus -florida) and 

 Benzoin denzoin, in the larval mines, and pupal cells of Gj'ytopliorus- 

 verrucosus and other borers. 



They may be traced and located by following their small, un- 

 packed mines, which are tunneled through the sawdust-packed gal- 

 leries of their host. 



