MASARIS. - 5 



This remarkable genus counts as yet but five representatives, 

 of which two are African, the others were recently discovered in 

 North America. 



The American 3Iaaaris differs from the African by having the 

 labial palpi much longer. The 1st joint long; the 2d very short, 

 about one-third or one-fourth the length of the first ; the 3d 

 arcuated, a little shorter than the first, and ciliated at tip. The 

 4th is quite rudimental, soldered to the inner face of the extremity 

 of the third. The tongue is quite extensile as in the African 

 type. The maxillary palpi are also quite rudimental, only appa- 

 rent as a little tubercle. The American Masaris are also distin- 

 guished from the African by the antennas of the 9 which are 

 more globularly clubbed, nearly as in Celonites. The males 

 which I can only judge by the figure given, have also the terminal 

 part more globular or at least less elongated than in M. vespi- 

 form is. 



1. Antennae of ? clubbed, having 5 soldered terminal articles, 



slightly dilated, not forming a distinct knob; the first article 

 very long. Labial palpi very short 

 M. vespiformis Latr. (North Africa.) 



2. Antennae of 9 terminated by a knob, as well as those of % ; 



the five last articles forming an oval dilated mass. Labial 

 palpi moderate. 



1. m. vespoides Cress. — Nigra, flavo variegata, abdominis sesroentis 

 late flavo-fasciatis ; faseiis 2-5 utriuque nigro-niarulatis ; 6° Memento 

 flavo-bitnaeulato ; alis flavescentibus ; scutello planato metanuto bis- 

 pinoso ; antennis % elougatis, articulo primo brevi, globoso, ultimis 5 

 in clavam ovalem glutinatis ; 9 brevibus, primo articulo tertio brnviore, 

 3° elongato, 4°, 5° niediocribus, ultimis 5 in clavam subglobosam 

 glutinatis ; abdomiue % apice fisso, segmentis 2-3 subtus processibus 2 

 iu.striiutis. 



Masaris vespoides Cuesson, Proc. Ent. Soc. Pbilad. II, 1863, 69, PL iv ; 

 III, 673. 



% . Total lengtb, 9 lines ; expanse of wings, 1 . r > .V lines. 

 9- Total lengtb, 8 lines; expanse of wings, 14 lines. 



Male. — Clypeus subquadrate, deeply emarginate, with the 

 angles rounded; mandibles somewhat obtuse, with two indenta- 

 tions near the apex. Antennas a little longer than the head and 



