BYRRHUS. 49 
in this species are longer than in others, and 
rather perfoliated than merely knobbed. 
Byrrhus Museorum resembles Byrrhus Scro- 
phulariae, but wants the red suture of the wing- 
shells; it is often seen in houses, and commits 
depredations in animal and vegetable collections, 
in the same manner as the insects of the genus 
Ptinus and Dermestes, 
V. VI. P. I. 
4 
