102 
271. The Hairy Clerid. 
Chariessa pilosa Forst. 
The larvee prey upon and do much toward preventing the increase of several of the. 
destructive flat-headed borers (Buprestidx) in deciduous trees. 
Exurisit: Adults. 
THE CLICK BEETLES. FAMILY ELATERIDZ. 
272. The Eyed Elater.. 
Alaus oculatus Linn. 
As a larva preys upon numerous species of bark and wood boring insects in 
deciduous trees. 
Exuisir: Adults. 
273. The Small-Eyed Elater. 
Alaus myops Fab. 
As a larva preys upon the larger species of borers in coniferous trees. 
Exutisit: Adults, larva. 
274. The Four-Winged Parasites. 
Order Hymenoptera. Families Ichneumonide, Braconide, Chalcidide, ete. 
Exnuipit: Two larval galleries of the rigid cypress borer (ime rigida), in one of 
which the insect attained full development, while in the other it was attacked and 
killed by a parasite, Bracon sp. 
Adults and cocoons of several species which attack larvee of butterflies and moths. 
Adults and cocoons of several species which attack larvee of wood-boring insects. 
THE TROGOSITIDS. FAMILY TROGOSITIDZA. 
275. The Green Trogositid. 
Trogosita virescens Fab. 
A very important enemy of nearly all the larger and more destructive bark-beetles. 
The adults conceal themselves in the outer bark, and the larvee enter the galleries 
and prey upon the insects therein. 
Exuipit: Adults. 
THE COLYDIIDS. FAMILY COLYDIIDA. 
276. The Tuberculate Colydiid. 
Aulonium tuberculatum Lee. 
The adults enter the galleries and with the larvee feed upon various species of bark- 
beetles in all their stages. 
Exuisir: Adults. 
277. The Line-Marked Colydiid. 
Colydium lineola Say. 
The adults enter the galleries and their larvee feed upon the developing brood of 
various species of Ambrosia beetles. 
Exuisit: Adults. 
