HEMIPTERAHOMOPTERA APHIDES. 273 



dorsuosus and exceedingly long, l>ein_r nearlv halt' as long as the wing. 

 The culiital vein arises at. about the middle of the proximal half of the 

 space l)et\veeii tin: first oblique and stigmatic veins, takes a course in the 

 space- open to it, a little below the middle, and forks only a little before the 

 matic vein, far from its base and very low down, the inferior branch 



being -llOl't. 



Length of body. 3.5 mm ; of fore wing, 7.5""". 



Named tor mv iVieml, George Bowdler Buckton, Esq., whose mono- 

 graph nf the British Aphides is a monument of patient work. 

 Florissant. Two specimens, Nos. 20G7, 14289. 



15. PTEROSTIGMA Buckton. 



I'lrroitigma Buckt., Mouogr. Brit. Aphides, IV, 178 (1883). 



Hi ad and aiitenn;e precisely as in Anconatus, excepting that the basal 

 anteiinal joints are slenderer, so that the frontal space between the ;n 

 is several times their width.' Fore wings exceptionally narrow, with the 

 straight postcostal vein distant from the convex margin, the stiguiatic vein 

 arising 1>, lore the middle of the long, curving and tapering stigma, so that 

 the cell is ncarlv two-fifths as long as the wing (it is shorter than would 

 appear from the plate). Cubital vein very feeble, once forked well IK.- fore 

 the base of the stigmatic vein and at no very great distance from its own 

 origin, which is near the middle of the space between the first oblicpie and 

 the stigmatic. veins. Second oblique vein arising close to the first and 

 inanv times nearer it than the cnliital vein, sinuous and diverging from the 

 straighter first oblique vein at a considerable angle, so that the first discoidal 

 cell between them is about, four times broader on the hind margin than at 

 the base. Legs Y,.|- V sh-nder, but not very long. Abdomen pretty n 

 larly oval, apicallv rounded. 



Tulilf nf I: /nia. 



I; , , of thi lecond oblique and tigmatio veins hardly m m the extreme breadth of the 



win:; 1. /'. rx'Hirnm. 



Basesof the second oblique aud stigmatio veins more than half as distanl tbeextroi 



nt" 1 1 if w in i; '.'. /'. iM'/i-um. 



What I'.u. mi ill" tlir. ji i-art ol" tin- n^hl an 



VOI. XIII IS 



