APPENDIX. 217 



TRIGONODERUS Tarrlia. Mas. Cyaneo-viridis, abdomine pur- 

 pureo-cupreo basi viridi, antennis nigris, pedibus fulvis, fe- 

 moribus piceo vittatis, alls limpidis. Page 128. 



Body narrow : head and chest convex, finely shagreened : head 

 bright blue, much broader than the chest : eyes and eyelets red : 

 feelers black, slender, hairy, very slightly subclavate, a little longer 

 than the chest ; first joint long, slender, dark tawny; second cup- 

 shaped ; third and fourth very small ; the following segments to the 

 tenth successively decreasing in length ; club spindle-shaped, a little 

 broader than the tenth joint, and rather more than twice its length : 

 chest spindle-shaped, bluish green : fore-chest rather long, narrower 

 in front ; its length above more than half its breadth : shield of the 

 mid-chest long ; sutures of the parapsides strongly marked ; axillae 

 parted by one-sixth of the breadth of the chest ; scutcheon subrhom- 

 boidal, with a suture along each side, and a slight transverse chan- 

 nel near the tip : hind-chest large, obconical, declining, with a ridge 

 along the middle and a rim on each side : petiole very short : abdo- 

 men depressed, smooth, purplish copper, green at the base, very 

 slightly increasing in breadth from the base till near the tip, shorter 

 and a little narrower than the chest ; metapodeon occupying rather 

 more than one-fourth of the back ; octoon and following segments 

 of nearly equal length : legs pale tawny ; hips green ; a piceous 

 line along each thigh ; four hinder-feet yellow with brown tips : 

 wings colourless; veins piceous; ulna much more than half the 

 length of the humerus ; radius a little longer than the ulna, reach- 

 ing- almost to the tip of the wing ; cubitus not half the length of the 

 ulna ; wing-brand very small. Length of the body l line ; of the 

 wings 2 lines. 



TRIGONODERUS Alebion. Mas. Viridis, capite cyaneo, abdomi- 

 nisj disco purpureo-cupreo, antennis nigris, pedibus piceo-fui- 

 visfemoribus, viridibus, alis limpidis. Page 128. 



Head and chest convex, shagreened : head blue, broader than 

 the chest : eyes and eyelets red : feelers black, subclavate, a little 

 longer than the chest ; first joint long, slender, green ; second cup- 

 shaped ; third and fourth very small ; the following joints to the 

 tenth of equal thickness but successively decreasing in length ; club 

 spindle-shaped, a little broader than the tenth joint and nearly twice 

 its length : chest green, spindle-shaped : fore-chest rather long ; its 

 length more than half its breadth : shield of the mid-chest long ; su- 

 tures of the parapsides rather distinct ; axillae parted by hardly one- 

 sixth of the breadth of the chest ; scutcheon subrhomboidal, with a 



