No. 2323. LARVAE OF THE GLERIDAE—BOVINO AND CHAMP LAIN. 625 



enough. Then running with a rapidity that resembles a leap, it seizes 

 the prey. Grasping it with the front and middle pair of legs and 

 holding on to the bark by the hind pair, sometimes balanced by the 

 tip of the abdomen against the bark, it proceeds to feed. With its 

 strong jaws it breaks the chitin or separates the segments and feeds 

 upon the soft tissue and viscera within. 



In several genera there are instances where the adults are ap- 

 parently not predaceous, but are to be found on flowere, where they 

 feed upon the pollen. 



During their activities mating occurs, on flowers, on infested trees, 

 or trees being attacked by barkbeetles. It is more difficult to find 

 them ovipositing. The eggs are usually placed in or near the en- 

 trance gallery of their host. 



Certain species of Clerid larvae in all stages are found in the gal- 

 leries and mines of bark and wood borers. They prey upon the 

 eggs, larvae, and sometimes the dead (?) parent adults of the host. 

 They feed voraciously and grow rapidly. As mature larvae they 

 pass a considerable time often without taking much food. During 

 this stage they construct the pupal cell in w^hich considerable time 

 is spent previous to pupation. The pupal cell may be made in the 

 earth, the bark, or in the cell of the host. Many species line their 

 cells with an exudation of a white silvery color. Others use it to 

 seal the ends of borer cells which they reconstruct to suit their pur- 

 poses. Others make a complete cocoon, utilizing the exudation or 

 cement to hold the particles of earth together and to form a smoother 

 interior on which to lie as pupae. 



Clerids overwinter, sometimes in all stages, sometimes in a certain 

 stage. The time of transformation to adults is generally in the 

 spring but it varies. Some of the species may have more than one 

 generation in a season, especially if there are several generations of 

 the host. Others appear to pass several years in the larval stage. 



The following notes are from the records on file in the office of 

 the forest entomologist, United States National Museum, made by 

 members of the Branch of Forest Entomology, of the Bureau of 

 Entomology, United States Department of Agriculture, and from 

 special notes and observations by the author. 



Genus MONOPHYLLA Spinola. 



MONOPHYLLA CALIFORNICA Fall (=M. PALLIPES Schaeffer) . 



Is a predator on Bostrychidae and small secondary woodborers m 

 Acacia greggii and Prosopis julifiora from Arizona. Collected by 

 M. Chrisman and reared at Eastern Station, Forest Insect Branch. 

 Schizax senex reared from same wood. 

 144382— 20— Proc.N.M.vol.57^ 40 



