gQ THE ENTOMOLOGIST. 



b Lees red ; hind cox® and femora black ; hind coxs unarmed 



^ 14. (4.) troglodytes, 3 hues {I, a). 



B Abdominal segments, Snd to 3rd or 4th, vary from yellow-red to 



brown-red, or almost black ; legs and antennae red ; generally pro- 



and meso-thorax also (female). 18. (4.) coUaris, '2i hnes (t, s, a). 



C. Abdomen marked with red and black, or dark brown (males). 



a. Face whitish ; legs reddish straw, base whitish. 



4. scutellaris, 6 Jnies (t, s). 



b. Orbits white; front legs fulvous, base white ; hi^^f "jg^'^-ff ^^l^^' 



apex of coxse and of trochanters, white. 14. troglodytes, M 1 nes. 



c. Face black, coloured as in the female, but with the .t^esothorax b ack 



18. collans, 2i lines (s, I, a). 



Section 4.— Scutellum black ; abdomen red, or red and black. 

 A. Hind femora red ; apex black; base and apex of hind tibiae black, 

 remainder red ; antennae tricoloured (females). 



a. Coxse red. 



■:< Hind coxse armed. , 1 1 i .. 



t Abdominal segments, 1st to 4th, red, 1st more or less b ack ; pos t- 



^ petiole shining. - - - 3. (1.) melanogonus, 2^-3 hues. 



H Segments, 2nd to 4th or 5th, red; post-petiole finely aciculate 



tr oegmems, ^^ ^^^ ^^^ fulvitarsis, 3^ lines. 



*•-;: Hind coxse unarmed. 



Segments, 2nd to 4th, red; post-petiole shimng. 



o (4.) formosus, o^ lines. 



b. Coxae black. , , , , ^ 

 I Segments, 1st to 5th, red ; petiole black; tooth on coxae long. 



+ ^ 1. (1.) semivulpmus, 3i — 4 lines. 



tt Segments, 1st to 4th, red ; petiole black. i ,. 



§ Tooth on cox® moderate. - - 3. (1.) plamfron, 3-3^ mes. 



§1 Interrupted keel on hind cox®. - 8. (2. xx.) ^-i'^^^^^^'^^^'^^^^J" ^^^ 



B Legs red; apex of hind femora and tibi® black; segments 2nd and 



3rd, and towards the base of the antenn®, red ; cox® with a very 



minute tooth (female). - - - , ". /^- "'f ^f'' ^U";^!: 



C. Legs red ; apex of hind femora and base of hind cox® dark ; antenn® 



tricoloured- (females). , ^., j • ^a 



a. Abdominal segments. 2nd to 4th, red 5th ^^.^^h red-margined. 



10 (3.) ischiomehnus, 2i— 3 lines (/). 



b. Segments, 1st to 4th, red. - - 16- if.) jucundus, H lines. 



D. Legs red ; base of hinder cox® fuscous (females). 



a. Antenn® with a white ring. . ^., . «.i • -.t.;, 

 =;- Abdominal segments, Ist to 4th (and margins o 5th to 7th n. ischio- 



melinus), r°ed; 1st segment more or less black; apical segment not 

 red marked, 

 f Hinder cox® with a small crest. ^^.... ,. „i q ii„^e ^A 



10. (3.) ischiomehnus, 2^ — 3 iuies [t). 



.. TT- J ^ ,-,na,.mpri - - - 1^ . U.) <mttulatus, 2, WwQS. 



\\ Hinder cox® unaimea. - ^ J 



=;:* Abdomen red, base black; cox® with a ong tooth 



4. (1.) scutellaris, 6^ lines (s). 



b. Antenn® dark, towards the base red. - (4.) mpiger, 2i lines. 

 * The antennae vary much in depth of colouring; sometimes the pale ring is 



almost wanting. 



