360 



Dr. Malcolm Cameron on 



2. Maxillaiy socket wide and deep, extending 

 to the level of the posterior border of 

 the eye or beyond it. Mesosternum 

 broadly rounded or truncate behind, 

 extending but little between the 

 intermediate coxae ; metasternum 

 produced, bordered, not meeting the 

 mesosternum. 



— Maxillary socket neither' wide nor deep, 



not extending to the level of the 

 posterior border of the eye. 

 .3. 1st joint of the posterior tarsi twice as 

 long as the 2nd .... 



— 1st joint of the posterior tarsi but little 



longer than the 2nd 



4. Labial palpi distinctly 2-jointed. 



— Labial palpi 3-jointed, sometimes (Para- 



theta and Fenyesia) obscurely so. 



5. Sculpture coarse and rugose . 



— Sculpture fine, not rugose. 



6. Labial palpi almost styliform, the 2nd 



joint half as long as the 1st. Tongue 

 narrow and elongate, a little widened 

 anteriorly, the apex with a small 

 emargination ..... 



— Labial palpi normal. Tongue split into 



two lobes. 



7. Tongue rather long, split nearly to the 



base into two narrow diverging 

 lobes. Mesosternal process gradually 

 narrowed, the apex bluntly pointed, 

 the intermediate coxae moderately 



— Tongue rather short and broad, split to 



the middle into two diverging teat- 

 shaped lobes. Mesosternal process 

 narrow, sharply pointed, the inter- 

 mediate coxae narrowly separated 

 8. Head with very narrow, distinctly ex- 

 posed neck ; the base of the head not 

 at all concealed by the thorax. 



— Head with broad neck; the base of the 



head more or less concealed by the 

 thorax. 



Zyras Stcph. 

 Myrmedonota Cam. 



Schistogenia Kr. 

 6. 



Exatheta Cam. 



Mimatheta Cam. 



Mimacrotona Cam. 



10. 



