ST. (OMOCESTUS) YIKIMCLCS. 239 



with the jaws. Vertw produced as in 0. rtiji/ws, with 

 a central carina at the tip. For^olw of the vertex as 

 in 0. riifipf*. Median xiilc.m of the frons moderately 

 pronounced below the conspicuous median ocellus. 

 Cross furrow of the pronotum slightly nearer the front 

 margin ; two longitudinal black streaks, interrupted 

 by the lateral cavinae (usually pale), which are slightly 

 angled near the front margin of the pronotum. Elytra 

 (PI. XX, fig. 6) longer than abdomen, pale brown, 

 sometimes with anal area greenish ; less spotted than in 

 0. rnji}x j * ; region between medius and cubitus narrow, 

 with subregular cross nervures. IV rut/a smoky at the 

 apex. Hind femora usually brown. 



FE.MALK IMACO (PI. XXIV, fig. 2).- -Colour more green 

 than that of the male ; //,///'/ femora often green. Much 

 more bulky than the male. 'Lcmjth- 18-28 mm. Antennae 

 slio'htlv shorter than those of the male. AY////W about 



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as long as abdomen or longer ; anal area green ; usually 

 a dull yellowish or pinkish streak between the sub- 

 costal nervures. Valves of the ovipositor without an 

 external tooth ; inner edge of lower ones produced 

 into a rather sharp point. 



VA i. -[ATI ox.- -There is a form of the female with sides 

 of head and pronotum, all the legs, and the fore part 

 of the elytra of a deep rosy red. Eland Shaw has speci- 

 mens of this form from Yarmouth (Winston) and Louth 

 (Wallis-Kew). It is perhaps Stephens's nibi<-n ,ul . 

 On 14 August 1917 I took a female in the Xew Forest 

 somewhat resembling this form. There was very much 

 deep dull crimson in its colouring. Even when seen 

 on the grass it was so strikingly coloured as to catch 



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the attention immediately. The antennae were tinned 



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with crimson towards the base ; the dorsal surface was 

 green generally as usual, except for a median crimson 

 line on head and thorax ; face, sides of head and thorax, 

 and dorsal surface of the femora of all the legs were 

 crimson ; costal region of the elytra dull crimson. 

 Shaw speaks of an example with yellow femora. On 



