170 Mr. Cameron on 



Pronotum quadrate, almost transverse above in front ;• 

 rugosely punctured and furrowed down the middle above,, 

 the sides longitudinally rugosely punctured, almost striolated ; 

 mesonotum punctured, but not very strongly, and rather 

 irregularly; parapsidal furrows complete, diverging towards, 

 the front ; scutellum punctured, if anything, more strongly 

 than the mesonotum ; mesopleurse rugosely punctured ;, 

 metanotum shining ; there is a stout central keel ; one on 

 either side of it, which converge towards its apex, so as to 

 almost touch ; at a greater distance outside this than is the 

 second keel from the central, is another stout keel, which 

 also converges towards the apex ; and outside this again, 

 and quite close to the marginal keel, is another which runs 

 almost parallel with the latter. The space between the keels 

 is tranversely rugosely striolated, this being also the case 

 with the median segment, but it is more regular and there 

 is only a central keel. The sides of the metanotum 

 project into stout teeth ; the apex is convex (forming almost 

 the segment of a circle) ; metapleur^e irregularly reticulated- 

 Abdomen shining, shorter than the thorax ; the apex and 

 central segments somewhat thickly covered with longish 

 white hairs. Legs thickly covered with a stiff white pile. 

 Wings a little longer than the thorax ; the lower discoidal 

 cellule is open at the apex. 



The above is described from a specimen 7 mm. in length,, 

 and with the wings longer than the thorax ; but Mr. Walker 

 sends specimens measuring from 4^ to ^^ mm. in length, 

 which have the wings one-half or even one-fourth of 

 the length of the thorax. In these the punctuation is less 

 strongly developed, and the metanotal keels less distinct 

 (especially those on either side of the central), but otherwise 

 I cannot find any tangible differences. In the smaller 

 specimens the punctuation varies in intensity ; the amount of 

 red on the anterior legs varies considerably, and the 

 antennae may be black, dull testaceous at the base. 



