COLEOI=TERA, 455 
/3, Proaternum resting on the metasternum ; body short. 
14. Alcinous ’ (g. n.). 
B. Prothorax straight at base .... 16. Mastogenius (Sol.). 
II. Prosternum with a chin-lobe. 
A. Sternal cavity of ordinary size. 
1. Tibise dilated and sharp externally, furrowed within to receive the 
tarsi 16. Cryptodactyeus (g. n.). 
2. TibifB of ordinary form. 
a. Chin-lobe bilobed in front by a deep notch. 
17. Melibceus (g. n.) 
b. Chin-lobe entire, or broadly eniarginate. 
* Posterior thighs not enlarged ; posterior tibise with no ciliated 
space. 
a. First tarsal joint short. 
a. Antennae never lodged in narrow lateral furrows of the 
prothorax. 
** Body straight above ; no keels on the sides of the pro- 
thorax beneath. . 18. Par^iumerus^ (g. n.). 
ft Body arched above ; pro thorax with longitudinal or 
transverse keels beneath. 
aa. Scutellum of usual form and size. 
10. Eumerus ^ (L. & G.). 
/3/3. Scutellum large, conically produced. 
20. Eumerophieus ^ (g. n.). 
h. Antennae during repose lodged in lateral furrows of pro- 
thorax. 
* * * Head small j abdomen rounded at apex. 
21. Rhaeboscelis ® (Chevr.). 
ft Head rather large, 4-tubercular ; abdomen strongly bi- 
spinous at apex . . 22. Acanthopygus ® (g. n.). 
First joint of tarsi, especially the posterior, very long. 
23. Agrilus (Meg.). 
t Posterior thighs enlarged. 
a. Posterior thighs brilliant metallic red. 
24. PSEUDAGRIEUS (g. n.). 
/3. Posterior thighs of the same colour as the other legs, with a 
small subbasal tooth ; posterior tibias with a ciliated space on 
the outer edge. 26. Sambus (g. n.). 
B. Sternal cavity deep, much prolonged behind the intermediate cotyloid 
cavities 26. Ceinocera (g. n.). 
Trachydes. Deyrolle (Ann. Soc. Ent. Belg. tom. viii. pp. 218^ 
219) gives the following table of the genera into which he divides 
this tribe : — 
^ Type A. nodosus (Laf.). * Type P. imperator (Gory). 
® Type B. chryselytrus (Perty). 
* Type B. corcehoides (Deyr.). ® Type P. purpurms (Chevr.). 
® Type Stenoyaster furciventris (Chevr.). 
’ Types Agrilus lesueuri (Chevr.), .4. modicus (Gory), and A. reichei (Gory). 
