240 



THE CANADIAN ENTOMOLOGIST. 



(17) B. mimas, Handl. 

 iMiEROBEMBEX, Patton. 

 (i) M. monodonta, Say. 

 (3) MoNEDULA, Latreille. 



(i) M. signata, Linn, $ ^. 

 (2) M. carolin, Fabr., $ ^ 

 {3) M. spinosa, Cr. 



=formosa, Cr. 



(4) M. serrata, Hdl. 



(5) M. pulchella, Hdl. 



=minatula, Hdl. 



(6) M. tuberculata, Fox. 



(7) M. plana, Fox. 



(8) M. emarginata, Cr. 



(9) M. femorata. Fox. 



(10) M. pictifrons, Smith. 



(11) M. tenuicornis, Fox. 



(12) M. scitula, Fox. 



(13) M. exiqua, Fox. 



(14) M. villosa. Fox. 



= mamillata, Fox nee Hedl. 



(15) M. usetata, Fox. 



(16) M. pulla, Hdl. 



(17) M. nigrifrons. Pro v. 



(18) M. heros, Fabr., ? S  



(19) M. surinamensis,De Geer, $. 



(20) M. maculata, Fabr., $ ^. 



(21) M. punctata, Fabr., $ ^. 



(22) M. dives, Handl. 



(23) M. mexicana, Handl. 

 (4) Steniolia, Say. 



(i) S. duplicata. Say. 



=scolopacea, Handl. 



(2) S. obliqua, Cr. 



(3) S. tibialis, Hdl. 



(4) S. longirostra, Say. 



Family XIX. — Larridse. 



This family seems to be closely allied to the family Bembicidse, but 

 is readily separated from it by the sma//, not free, labrum, which is 

 usually completely hidden under the clypeus ; the ocelli are distinct or, at 

 most, with only the hind ocelli aborted or represented by cicatrices; the 

 front wings have always a distinct stigma, while the cubitus in the hind 

 wings originates most frequently beyond the transverse median nervure, 

 the latter being straight, or at least never c^-shaped. 



The family is a most extensive one, and widely distributed into all 

 quarters of the globe, the temperate regions being especially rich in genera 

 and species. 



Four distinct groups have been recognized, which I designate as sub- 

 families, distinguishable as follows : 



Table of Subfamilies. 



Hind ocelli normal, distinct 2. 



Hind ocelli more or less distorted, obsolete or subobsolete, or indi- 

 cated by cicatrices ; mandibles most frequently emarginate on under 

 side Subfamily I., Larrinee. 



