1908.] 



133 



— Frontal area without the three earinae described above. Ventral apex of <? 



abdomen always pointed and never emarginate Ifj- 



16. Ground colour in life green, though after death it fades to yellow. Breast 



always pale in both Fexes. Occiput always with some black, if only a mere 

 spot just behind the vertical area ' '• 



— Colour in life reddish-yellow, not green. Breast in some <? J black. Occiput 



sometimes immaculate ^ ' 



17. The frontal ridge is interrupted by a sulcus, so that, seen from above, it seems 



broken into a pair of more or less contiguous tubercles 19- 



— The frontal ridge is unbroken 1^- 



1^. Apical production of last J dorsal segment not nearly as long as broad. The 



? vertical area and the (central) part of the occiput which adjoins it is 

 entirely black. Mesonotum nearly all black, but scutellum pale, except at 



its apex, which is black ht/poxantfius, Forst. 



{orhitalis, C). 



— Production at apex of S abdomen as long as broad. Vertical area of ? quite 



pale, and occiput merely dotted with black in its centre. Mesonotum with 

 widely separated black streaks ; scutellum pale, without black at apex, but 

 with a characteristic small black spot in the centre of its disc... 



polyspilus, Forst. 

 {glutinosse, C). 



19. Apical dorsal process of S abdomen longer than broad : scutellum partly pale. 



Saw-sheath of ? (viewed from above) triangular and subacuminate, its base 

 being pretty wide (twice as wide as the short cerci), while its apex is narrow : 

 all specimens I have seen have the mesonotum streaked with black, but 

 according to Konow these streaks may be absent— there are always, however, 

 black marks between the insertions of the wings and the (pale) scutellum... 



brevivalvis, Thorns. 

 {palliatus, C, croceus, ? , C, salicivorus, C). 



— S with the apical dorsal process of abdomen shorter than broad : its scutellum 



entirely black. Saw-sheath of $ narrow throughout 20. 



20. Smaller (7 mill, long., or less). Interruption of the " frontal ridge " slight. 



The ? pale, with little black on the head or abdomen : its saw-sheath very 



narrow (hardly as broad even at the base as the cerci) f caprese, L. 



{sylvestris, C). 



— Larger (8—9 mill. long). Frontal ridge conspicuously broken. Ground colour 



darker than in " caprex'' fading to a ruddy brown ; and the black markings 



larger, especially on the abdomen above bergmanni, Dhlb. 



(dorsatus, C). 



21. Smaller species (4—6 mill. long.). Breast of 3 pale. Saw-sheath of ? narrow. 



Occiput and thorax of ? immaculate. Dorsum of abdomen usually with a 

 double row of little black spots running along its longitudinal diameter... 



testaceus, Thorns. 

 {Jlavescens, C). 



