386 



JAMES WATERSTON. 



pedicel one-fourth of scape, slender, length one-fourth (at the base) to one-third (at 

 the apex) of the breadth. Joints from the scape onwards in the ratio 21, 10, 21, 18, 

 17, 16, 14, 13, 12 ; club 21, with only the first septum distinct, but probably in ratio 

 2:2:1; club not wider than the preceding three joints ; length to breadth, as 7 : 3 ; 

 funicle as a whole nearly cyHndrical ; the widest joints only one- eighth greater than 

 the first, which bears only two or three sensoria at the upper apical angle. On all the 

 succeeding joints the sensoria are numerous. 



Thorax : the surface between the thimble-like punctures is rough, reticulate, the 

 punctures setigerous, but most of the dorsal bristles fugacious. Scutellum broad 

 apically, with widely divergent teeth whose inner edges contain a rounded obtuse 

 angle. Metanotum : on each side 9-10 transverse, short ridges with quadrate 

 punctures between. Propodeon : outside the long central cell are about seveni 

 similar cells separated by well-defined ridges which run back without cross-connections 

 to a stout ridge rising at the outer angle of the petiolar hollow and running forward to 

 the first projection behind the spiracle. Behind the ridge a dense long pubescence 

 arises (fig. 4) ; the petiole is broadly based on the propodeon. 



Fig. 4. Propodeon of Stomatoceras exaratum, sp. n. 



Fore wings not quite two and a half times as long as broad ; length, 2*85 mm. ; 

 breadth, I'l mm. ; submarginal : marginal : radius : post-marginal, as 

 20 : 5 : 1 : 1 ; the post-marginal and the radius more exactly as 7:5. The sub- 

 marginal bears 32 bristles up to the pustules at its junction with the marginal. Below 

 the submarginal, from near the base onwards, is an irregular row of scales, which 

 become two to three deep on the uprise to the marginal. Along the lower edge of the 

 marginal, or immediately below, a single row of scales ; on both bands a few scales 

 occur irregularly mixed with stout short bristles. These are more numerous on the 

 first band below the radius at the side of the clear band, and on the middle of the second 

 band. Hind wings : length, 2*15 mm. ; breadth, '65 mm. About eighteen bristles 

 along the base of the costa ; ten to twelve stiff bristles in the frenulum. 



Legs resembling those of S. micans, and with similar proportions, but the under 

 surface of the hind femur is produced into a deep rounded angular median lobe, 



