634 PROCEEDINGS OF THE NATIONAL MUSEUM. vol.57. 



out the summer months, and finally crawl into cracks or beneath thick 

 bark, where they overwinter. I have observed 15 or 20 individuals 

 packed together beneath the thick bark of a dead tree during the 

 winter months in Pennsylvania. 



The larvae are to be found in the larval mines and galleries of the 

 host. In the case of Scolytus J^-spinosus^ they are very beneficial and 

 consume large numbers of the broods. Pupae not observed. 



Recorded from Pennsylvania, New Jersey, North Carolina, South 

 Carolina, West Virginia, Virginia. 



Observations by Fiske, Hopkins, Van Horn, Knull, Champlain. 



ENOCLERUS QUADRISIGNATUS Say. 



All of the forest insect records as well as my own show that this 

 species is principally a predator on ScolylMS 4-spinosus. It is abun- 

 dant where it occurs. 



The adults are nocturnal and may be observed at night, by the 

 aid of a strong light, running over the Scolytus-inf ested trees, feed- 

 ing upon the /Scolytus and other insects attracted to these trees. I 

 have observed an adult carrying off the adults of Saperda discoidea 

 that were ovipositing in the tree. 



Adults were observed during June, July, and August. They are 

 attracted to light and may be caught with trap lanterns. Mating 

 and ovipositing take place at night. 



The adults are hidden during the daytime beneath bark, in cracks 

 or in debris at base of tree. 



Eggs are placed in the entrance gallery of Scolytus. The larvae 

 upon hatching begin their travel into the galleries and through the 

 mines of the Scolytus, feeding as they go. They consume a large 

 quantity of the Scolytus broods. 



Larvae of this species overwinter in the Scolytus larval mines. No 

 pupae were observed. 



Recorded from Pennsylvania, North Carolina, West Virginia, Mis- 

 souri. 



Observations by Kirk, Hopkins, Kirk, Champlain. 



ENOCLERUS LUNATUS Spinola. 



Notes by W. F. Fiske : " This species has been very frequently noted 

 and taken crawling over peach trees which have been attacked by 

 Scolytus rugulosus in Georgia." 



During June and July the adults may be found on flowers and 

 foliage. It is more of a southern species. 



Recorded from Georgia and North Carolina, Fiske; Falls Church, 

 Virginia, J. N. Knull. New Jersey, E. Daecke. 



ENOCLERUS PALMI Schaeffer. 



Waldo Canon, El Paso County, Colorado, May 10. xldult on bark 

 surface of trees infested with Dendroctonus ponderosae ; at elevation 



