190 

 1961), at lights, and feeds on fungi on logs and dead tree 



trunk (Kirk 1969), under bark (Loding 1945), etc. Boyle 



(1956) consolidated much of this information in his account 



for I. quadripunctatus quadripunctatus . 



Large eye facets of this species suggest nocturnal 

 activity. The majority of specimens with any collection 

 data were collected at lights, substantiating the nocturnal 

 hypothesis. 



Skelley, et al. (1991) compiled fungal host data on the 

 erotylids north of Mexico. They listed 5 fungi as hosts: 

 Irpex lacteus (Fr . : Fr . ) Fr . , Oxyporus latemarginatus (Dur.& 

 Mont, ex Mont.)Donk, Phellinus gilvus (Schw.)Pat., Polyporus 

 gilvus (Schw.)Fr., and Poria sp. Only Oxyporus 

 latemarginatus (= Poria ambigua Bres.) had more than one 

 recorded collection for I. q. quadripunctatus, including 

 rearings . This fungus is a white prostrate polypore which 

 grows on the underside of dead wood suspended above the 

 ground. Deciduous trees with dead limbs, stumps, or dead 

 wood not touching the ground for some of its length, are 

 suitable substrates for this fungus. I have found large 

 numbers of Ischyrus q. quadripunctatus in these situations, 

 occasionally associated with larvae. 



The larva of I. q. quadripunctatus was first described 

 by Chapuis & Candeze (1853), later by Weiss (1920), and 

 Skelley (1988b) . Lawrence (1991) illustrated this species' 

 larva, but provided no description. It has the dorsal 

 shields darkened, nearly black, and the pronotum with false 



