Classification of the Coleopterous family Dynastidx. 355 



A series of examples were taken by a correspondent of 

 Dr. Fr. Ohaus upon a flowering " Schling " plant. 



This species is very closely related to L. Btirmeisteri, 

 Wat., from which it differs markedly in the armature of 

 well-developed males, but in minute particulars only in 

 females and undeveloped males. The general form is a 

 little less broad and flattened, the elytra not widening at 

 all behind the middle as in the other species. The front 

 angles of the prothorax are more prominent and the lateral 

 angulations rather less prominent and situated a little 

 further back. This applies to all specimens of both sexes. 



In the male the prothoracic horn, which in L. Burmeisteri 

 is broad at its base and somewhat narrows to its extremity, 

 is club-shaped, being constricted near the base and swelling 

 out at the tip, where the sides bend over, producing the 

 appearance of a bulb when seen from behind. It is less 

 broadly and deeply impressed at the base behind than in 

 the allied species. The clypeus is more angulated on each 

 side than in L. Burmeisteri, but the cephalic horn is not 

 different. In small males with only a rudimentary thoracic 

 horn the club-shaped form is not seen, 



I have seen 16 examples, 11 of which are males. 



In a recent paper (Ann. and Mag. Nat. Hist. (7), XIX, 

 1907, p. 357) I have suggested the transference of the 

 genus Oryctomori)kus from the Dynastidse to the Rutelidse, 

 I consider it desirable to take the same course with two 

 other aberrant genera hitherto regarded as belonging to 

 the Dynastidse, viz., Peltonotus and Pachyliis. These are 

 widely different one from the other, but agree in having 

 a well-developed externally-visible labrum and unequal 

 claws upon all the feet, and in Pachylus one claw of each 

 pair is toothed. These are features characteristic of the 

 Rutelidffi, but the genera are very aberrant and must 

 occupy an isolated position in any family to which they 

 are referred. 



List of Genera and Species referred to. 



Pentodon syriacits, Kr. (= Heteronyclius cribratcllus 



Fairm.), p. 322. 

 P. hidentulus, Fairm., p. 322. 

 P. (?) descrti, Heyd., p. 322. 

 Alissonotum, new genus, p. 322. 



