262 THE CANADIAN ENTOMOLOGIST. 



Trogoderma tarsa/e, Mels. — The larva of this species is unfavourably 

 known as an occasional museum pest, and is generally supposed to live 

 solely on animal matter, which it undoubtedly prefers ; but it can likewise 

 live on vegetable food as well, as the following demonstrates : A few 

 packed figs were placed in a paper sack and securely tied and placed in 

 a trunk while in Florida, in May, which was not opened till May of the 

 next year, when the figs were found infested by the larvse and pupje of 

 this species, while over sixty recently disclosed beetles were taken from 

 the sack. Possibly in this instance the parent beetle may have accident- 

 ally been inclosed with the figs, and may not have from choice selected 

 them as suitable food for her oifspring, but it is in demonstration that this 

 species can propagate itself on either animal or vegetable products. 



The larvse are more readily distinguishable from those of T. ornatum 

 than are the beetles themselves ; those of the latter have the last three 

 abdominal segments dark ; in the former some have the last three dark, 

 with a spot on each side of the preceding two ; some with the last and a 

 spot on each side of the preceding two, dark, while one is occasionally 

 seen entirely pallid. Both species pupate within the larval skin wherever 

 it may be convenient. 



Corymbites elongaticollis, Ham. — I find that this species is placed in 

 some collections as carichius. Germ., to which it bears considerable 

 resemblance. It has been, as yet, taken but rarely in Western Pennsyl- 

 vania, but appears to be more common in Canada, where I have likewise 

 taken it. I have not seen an example of the true caricinus from the 

 region eastward from the Mississippi, and I strongly doubt its existence 

 there. Any comparison between the two species must be made with 

 caricinus from the Pacific Coast. Several obvious differences will be 

 observed : in caricinus the front is prolonged and much depressed at 

 middle like in Asaphes, the depressed portion being smooth and with a 

 few coarse punctures ; in elongaticollis the front is distinctly and uniformly 

 elevated, more or less transversely concave and densely punctate ; in the 

 former the thorax is less depressed, uniformly rather densely and coarsely 

 punctured, the punctuation of the latter being comparatively fine, sparse 

 on the middle, denser on the sides ; in caricinus the elytral intervals are 

 less convex and therefore apparently wider. Many other differences exist — 

 difficult to make plain in print to such as have not both forms, useless 

 to such as have. No one having both would for a moment proclaim 

 them the same species. Whoever united umbricola, Germ. , with caricinus 



