Vol. 1] Bradley.— The Taxonomy of the Masarid Wasps 391 



surface with the tongue-shaped chitinized piece which has been de- 

 scribed as lying at the base of the glossae. The maxillae present 

 features of considerable interest. The cardo is of the normal form, 

 bent at right angles to the stipes ; the inner surface of the latter meets 

 the ventral in a sharp ridge, crested apically with a comb of bristles. 

 The palpi are 6-segmented, the last two segments together equalling 

 the third in length. The apical portions are turned, so that from a 

 strictly ventral view one observes the edges of the lobes, rather than 

 their surfaces. From a somewhat external aspect, opposite the base 

 of the palpus, there is a triangular sclerite, projecting dorso-entad, 

 and bearing a few spines. This is ordinarily interpreted as the lacinia. 

 Very closely and broadly attached to its base is a large lobe extending 

 cephalad, and to the inner upper margin of this is attached a second 

 narrow lobe. The latter has on its upper margin a still narrower third 

 lobe. These three lobes seem to correspond to what usually together 

 pass for the mesal lobe of the galea, but this insect would suggest that 

 they may really be part of the lacinia. From an inner view of the 

 maxilla there is seen attached to the apex of the cardo a prominent 

 but scarcely chitinized oval lobe, margined dorsally with a thick fringe 

 of bristles, and with a few longer setae on the lower margin. This 

 lobe is present in all Masaridae that I have examined, and may repre- 

 sent the basal lobe of the galea. Apicad of it is a small ear-shaped 

 lobe, \QYj prominent because of being more heavily chitinized than 

 the other parts, and which probably is the outer lobe of the galea. 



The scape is elongate, slightly compressed ; the pedicel very short ; 

 the flagellum is incrassate toward the apex, but without forming a club, 

 composed of 10 distinct segments, the first almost equal in length to 

 the following 4 united. 



Humeri prominent, slightly angled; parapsidal furrows distinct; 

 the tegula small, scale-like, oval, the outer margin entire, by no means 

 reaching the base of the scutellum ; this is prominently elevated, but 

 with its surface flat, covering the postscutellum ; propodeum sloping 

 directly to its apex, i.e., without dorsal surface, and without any lateral 

 angles or even ridges. 



Cells R4 and R, united (i.e., two closed submarginal cells) and 

 embracing both veins M3+4 and M, ; m-cu arising from Cuj, which at 

 that point is deflected to meet M^. Hind wing with a small but dis- 

 tinct anal lobe. Anterior trochanter unarmed ; all the segments of the 

 legs with regular convex or slightly flattened surface, without ridges 

 or tubercles; spur of anterior tibia broad, acute, with a tooth on its 

 convex margin ; the middle tibia has two apical spurs ; the larger spur 

 of the hind tibia has its apex obliquely tridentate, the margin basad 

 of the inner tooth pubescent ; all claws are large and with a large sharp 

 tooth at base. 



The abdomen is like that of a Vespa. 



(^. General appearance of a Monobia or Eumenes ; head transversely 

 rectangular, the temples broad, not margined behind ; ocelli in a low 

 triangle, distant from the eyes; the latter with their inner margins 

 sinuate but not emarginate ; clypeus prominent, with anterior margin 



