1919.] 



9 



According to iny own views Saunders's Catalogue needs also con- 

 siderable and important changes in points of classification, but these are 

 not dealt with here. 



In the following list the synonyms, when given in brackets and 

 without an author s name, indicate the specific or generic name adopted 

 by Saunders in his Catalogue. Where a specific name is preceded by a 

 lettered number it indicates an additional species to be placed after the 

 species indicated by the same number in the Catalogue. A few questions 

 I have left unconsidered, e.g. that of Ceratophoriis morio, because such 

 imperfect evidence as I have been able to obtain inclines me to the 

 belief that Thomson's two sj^ecies are not distinct — at least in so far as 

 the supposed British exponents that I have seen. Again, in the case of 

 the brown bumble-bees, are we to take Smith's evidence that the Linnean 

 type of muscorum was that called agrorum in the Catalogue, when he 

 examined it some three-quarters of a century ago, and that this fixes the 

 name, or shall we consider that the inadequate description of Linnaeus 

 applies better to the pale-haired form of smithlanus and disregard the 

 typical specimen ? 



PSAMMOCHARIDAE. 

 (POMPILIDAE.) 



PsAMMOCHARES Latr. 



{POjIPILVS.) 



9 a, cardui Perkins. 



Hypsiceraeus Mor. & Durr. 

 {Ceuopales.) 



Sphex Linn. 

 {Ammophila.) 



Psen. 



(MiMESA.) 



Psenulus Kohl. 



{P.'SEX.) 

 DiODONTUS. 



1 fi friesei Kohl, 



Arpactus.* 

 {Haiwactis.) 



Oxtbelus. 

 sericatus Gerst. 



(inandihidaris.) 

 sp. ? 



{ibigripes.) 



argentatus Curt. 

 {mucronatns.) 



Crabeo. 

 1 a. kiesenwetteri Mor. 



nigritus Lep. 

 {•puhesrens.) 



var. inermis Th. 

 7 a. styrius Kohl, 

 ovalis Lep. 

 {anxius.) 

 21 a. planifrons Th. 



chrysostomus Lep. 

 xylurgus Sh, 

 interstinctus Sm. 



Odynerus. 

 Subg. 1. Oplomerus. 

 (HopLOPrs.) 

 4 a. simillimus Mor. 



Subg. 2 LEIONOTUS.f 



herrichii Sauss. 

 (basalts.) 



* The genera Arpactus, Gorytes, and Hoplisvs are distinct and should have been maintained by 

 Saunders. In his "Synopsis" he expresses a strong opinion as to their validity. Apparently 

 Hoplisus will be called Ckropales ! 



t This name is, I believe, preoccupied, and it was suggested by Saussure that it should be called 

 Odynerus propria dictus. But that name must be applied to the Symmorphus section. 



