HOW TO KNOW THE IMMATURE INSECTS 



109b. 9th abdominal venter bearing small plates in place of asperi- 

 ties. Fig. 310 Genus Boios, TENEBRIONIDAE 



The species pictured is 

 a medium sized beetle, 

 both adults and larvae 

 being found under bark 

 of dead pine trees. Some 

 systematists wish to make 

 a new family Boridae. 



Fig. 310. a, Boros unicolor Say; b. Ventral as- 

 pect of 8th and 9th abdominal segments. 



110a. 9th abdominal segment dorsally with a continuous row ol small 

 dark tubercles on the cerci and on the space between them. 

 Fig. 311 Family PYTHIDAE 



Look under bark for all 

 stages of these small 

 beetles. The species pic- 

 tured ranges from Labra- 

 dor through the New Eng- 



^i^oi^'A ''^♦ho niger Kby.; b. Dorsal aspect \and «5tntP<5 



of 9th abdominal segment with cerci. *°"^ siaies. 



110b. 9th abdominal segment only with 2 small tubercles proximally 

 on dorsal side ol each cercus. 

 Fig. 312 FamUy OTHNIIDAE 



The species pictured is found in the 



Middle West. This small family has 



only this one genus and but a few 

 Fig. 312. Othnius umbrosus Lee. specieS. 



Ilia. Antenna contiguous to mouth frame. 

 Fig. 313 



112 



Fig. 313. Dorsal 

 aspect of head. 



111b. Antenna inserted some distance in from mouth 

 frame. Fig. 314 113 



Fig. 314. Dorsal 

 aspect of head. 



115 



