36 REMARKS ON THE LINN^AN GENERA 



treille with Lethrus. Latreille indeed takes notice of an 

 " organization particuliere^" in Lethrus, which separates 

 it from Geotrupes, but does not remai'k that this same pe- 

 culiarity of construction unites it to Lamprima, though 

 probably on this very ground Professor Pallas'* and others 

 had already made it a Luca?ii(s. I shall not, however, 

 depend solely on the opinions of systematic writers to prove 

 the connexion between Lethrus and Lamprima, but resort 

 to observations already recorded. The following charac- 

 ters are extracted from Latreille's Genera Crustaceorum 

 et Insectorum, and are common to both genera. 



1. Antenncc articulis ultimis clavam infundibuliformem 

 formantibus, articulo hasilari elongato, conico. This 



character belongs to Geotrupes. 



2. Mandibul/s validissima cornea por recta:. This character 

 is common to Geotrupes and Lucanus. 



3. Maxilla; in Lamprima Jiliformes setosa. Maxilla;, in 

 Lethris processu terminali pilis spinulisque corneis, elou' 

 gaiis ciliato. 



It \vill I hope be allowed that nothing can more satis- 

 factorily show the affinity existing between the Lucanidce 

 and Lethrus, than this last remarkable analogy in the con- 

 struction of the maxillse. I shall therefore now consider 

 it as in a mamier proved, that we are to pass from the 

 Di/nastidce to the Lucanida, by means of Sinodendron, 

 and from the Geotrupida to the Lamprimidce by means of 

 Lethrus. I have but one more remark to make on the 

 Thalerophagous Recticera ; which is, that the consideration 



" Hist. Nit. des CmU. eldes Ins. \u\. x. p. 139. 



'' " Lucanus apterus.— Insectum anomaluin inter Lucanos et Scarabaos 

 coprideos ambiguum." Icones Insect. Pallas. 1. — Nov. Com.Pelrop. Laxmau 

 torn. xiv. p. 594. 



