1853.] 



283 



base, and not sinuate at the posterior angles, which are rectangular and very 

 slightly rounded ; the punctures are dense, very distinct. The elytra are dis- 

 tinctly punctured ; the sutural stria nnay be traced to the base, but is deeper 

 behind the middle ; there are traces of other striae near the apex. The pos- 

 terior thighs are connpressed, and at the middle of the inferior margin are armed 

 with a small sharp tooth. 



Div. 2. Anisotomini. 



Trochanteres postici simplices; coxcb posticcs approximatce. , 



This division is considered by Erichson as a distinct family, which he divides 

 into two groups : Anisotomini, with strongly spinous tibiae, and AgathiJiini, with 

 the tibiae slightly spinous, or merely pubescent. This arrangement does not ap- 

 pear altogether natural, as some of the species of Liodes have the spines of the 

 tibiae very distinct, while others have the same organs nearly smooth. Possibly 

 a more natural division might be into three groups, thus : 



A. Clypeus parvus capite connatus, vel vix distinctus ; caput subtus non 

 insculptum. 



B. Clypeus valde distinctus : caput subtus non insculptum. 



C. Clypeus nuUus : caput subtus sulcis profundis insculptum. 



The first group corresponds to Erichson's Anisotomini : the second contains 

 Liodes, and probably Amphicyllis : the third contains Agathidium only. The 

 first division is said by Erichson (Ins. Deutschl. 44) to be almost peculiar to 

 Europe : it will be seen, however, that it is quite respectably represented in this 

 country. 



Anisotoma Illiger. 



1. A. al t ern ata , oblonga, ferruginea, nitida, thorace subtiliter punctato, 

 elytris striis punctatis, interstitiis subtilissime punctulatis, alternatim pluri- 

 punctatis. Long. '18. 



Leiodes alternata Mels., Proc. Acad. Nat. Sc, 2, 103. 



One male from Alabama, Haldeman : Dr. Melsheimer's specimen was found in 

 Pennsylvania. The anterior tibiae are gradually and slightly dilated : the pos- 

 terior tibiae are elongated, curved inwards, and slightly thickened at the tip. 



2. A. a ssim i 1 i s , ovalis nigro-picea, thorace subtiliter punctato, lateribus 

 rotundatis, basi late rotundata utrinque punctis maioribus marginata, elytris sub- 

 tiliter punctato-striatis, interstitiis obsolete punctulatis, alternatim pluripuncta- 

 tis. Long. '16. 



Le Conte, Agassiz' Lake Superior, 221. 



One male, Eagle Harbor, Lake Superior. The anterior tibiae are slightly di- 

 lated, the posterior ones elongated and curved inwards. 



3. A.indistincta, rotundata, convexa, piceo-rufa, thorace obsolete punc- 

 tulato lateribus minus rotundatis, basi vix sinuata, utrinque punctis paucis mar- 

 ginata, elytris minus subtiliter punctato-striatis, interstitiis subtiliter parce 

 punctulatis, alternatin^i 3 vel 4 punctatis. Long. '11. 



Le Conte, Agassiz' Lake Superior, 221. 



? Leiodes puncto-striatus Kirby, Fauna Bor. Am. 110. 



One specimen, found on the north shore of Lake Superior. The anterior tibiae 

 are as in the preceding, the posterior ones are straight and not longer than the 

 others. Kirby says that the interstices of the elytra are smooth, and they really 

 appear so, except under a powerful lens : a new examination of Kirby's type 

 must, however, be made before they can be considered as identical. 



4. A. collaris, ovalis, convexa, rufo-testacea, antennarum clava, capite 

 thoraceque piceis, hoc sat dense punctato, lateribus valde rotundatis, rufescenti- 

 bus, basi truncata, utrinque punctis magnis marginata, elytris profundius punc- 

 tato-striatis, interstitiis subtilissime parce punctulatis, alternatim 2 vel 6 punc- 

 tatis. Long. 12. 



Le Conte, Agassiz' Lake Superior, 221. 



One male. Eagle Harbor, with the posterior tibiae slightly curved. 



