310 Ih. K. G. Blair— ^ Revision of 



no gaps of any size, to the Cynodonts, the resemblance of 

 whose skull to tliat of a mammal is so close as to render the 

 determination of tlie bones quite certain. 



^J'he only other temporal bone, the supratemporal, lies 

 between the squamosal, parietal, and tabular. This is the 

 position held by the upper bone in all Cotylosaurs and 

 Stegocephalia in which two are present. 



It is thus shown by direct tracinji that the outer temporal 

 element — tliat which in Stegocephalia lies below the auditory 

 notch and passes round behind the quadrate to touch the 

 pterygoid — is the mammalian squamosal, and should he 

 called by that name. 



In conclusion, I wish to express ray gratitude to Prof. 

 Broiii, not only for so kindly allowing me to describe his 

 valuable material, but also for his many personal kindnesses 

 during my visits to Munich. 



XXXIII. — A Revision ofi/)eFamib/Vyrochroi(\i!e{Culeoptera). 

 Jiy K. G. liLAia, 13. Sc, F.E.S. 



(Published by permission of the Trustees of the Biitish Museum.) 



[Plate XII.] 



Tnr; Pyrochroidse may be shortly characterized as Hetero- 

 mera having the anterior coxal cavities open behind ; the 

 head, which is held horizontal, constricted into a neck 

 behind ; the prothorax at 'base markedly narrower than the 

 base of the elytra; the tarsal claws simple; the antennse, at 

 any rate in the male, ramose ; and the eyes large, and emar- 

 ginate for the insertion of the antennse. 



Lacordaire, in Gen. Col. v. 1859, only recognized three 

 geiici'a — P)/rochroa, iSchizotiis, and Doulroides, — although he 

 included a fourth, Leniodes, with an expression of doubt as 

 to its true jjosition. The genus PiKjunoccrus, Fiscli., he 

 considered to be synonymous with DeiKlroiilcs, Latr. 



Since that date the constitution of the family has remained 

 almost unaltered ; a few new genera have been added 

 (Jschalia, Pasc =Kvjik'urida, Lee, and Pi/ipaljms, Fairm.). 

 The genus Pcdiliis, I isch., has by some authors been jjlaced 

 here. Though there is n)uch to l)e said in favour of enlaiging 

 tlie scope of the family to iiu-ludc this ^enus, and perhaps 



