410 Rev. F. D. Morice and J. H. Durrant on the 



Panzer has figured laetus (63-11) and arenarius (46*2) 

 in the Fauna Ins. Germ., and the two are apparently 

 identical, equaUing Cerceris arenaria Auctt. 



Latreille, 1802 (HN. Crust. Ins. 3) characterised his 

 Philanthus with coronatus F., triangulum F., and apivorus 

 Ltr. as its exponents — {apivonis is a synonym of triangu- 

 lum, and coronatus a rarer species of the same genus). 



In 1802 Latreille (I.e.) characterised Cerceris with ex- 

 ponents arenarius, rufipes, and ornatus; in 1810 (Cons- 

 Gen.) he definitely selected ornatus F. (i. e. ryhiensis L.) 

 as the Type of Cerceris. 



The results appear to be as follows : — (1) Jurine's 

 revision of Philanthus (30. V. 1801) being a year prior to 

 that of Latreille {after IV. 1802), his restriction of its 

 possible types to laetus, arenarius, and labiatus, must be 

 accepted. This means that arenaria L. is the Type, for 

 laetus is a synonym of arenarius, and labiatus was not 

 originally included in the Fabrician Philanthus. 



Ryhiensis L. (= ornata F.), Latreille's own Type of 

 Cerceris, is congeneric with, arenaria L., and Cerceris Ltr. is 

 therefore synonymous with Philanthus F., Jrn. {nee Ltr.), 

 as noted by Jurine (Nouv. Meth. Hym. 201) :— " Mr. 

 Latreille a donne le nom de cerceris a nos philanthes, en les 

 separant, avec raison, des autres hymenopteres." 



^Philanthus (F.) Ltr. {nee Jrn.) not being available for 

 the genus including triangulum F., Jurine's monotypical 

 genus Simhlephilus (Type : triangulum L.) should replace 

 it. 



The effect of the revision of Philanthus F. by Jurine 

 (1801) and by Latreille (1802) may be shown thus : — 



PHILANTHUS F. 

 Fabricius 1790 



Jurine 1801 Latreille 1802 



Philanthus (F.) Jm. = Cerceris Ltr. 



SiMBLEPHiLUS Jm. = *Philanthus (F.) Ltr. 



OONIUS Jrn. LN. = Palarus Ltr. 



