390 cobeid.t:. 



SyH02^sis of Genera. 



A. Head distiuctly produced in front of 



antenniferous tubercles. 



a. Fourth joint of antenujfi not shorter than 



third. 



a. Abdominal spiracles near but not close 



to lateral margins Plixachtus, p. 390. 



b. Fourth joint of antennfe shorter than the 



third. 



b. Abdominal spiracles close to lateral 



margin Brunsellius, p. 391. 



B. Head not distinctly produced in front of 



antenniferous tubercles. 



c. Abdominal segmental angles not exteriorly 



acutely produced Cletus, p. 392. 



d. Abdominal segmental angles exteriorly 



acutely produced Cletomorpha, p. 390. 



Genus PLINACHTUS. 



Plinachtus, >SY«/. O/^-. Vef.-Ak. Fbrh. 1859, p. 470; id. En. Hcnu 

 iii, p. 75 (1873). 



Type, P. spinosus. Still, a South-Africau species. 



Distrihution. Ethiopian and Oriental Eegions ; also recorded 

 from Japan. 



Head distinctly produced in front of the antenniferous tubercles : 

 antenna) with the fourth joint not shorter than the third, basal 

 joint moderately incrassated, much longer than the head ; pronotum 



Fig. 229. — Plinachtvs nctcular 



with the lateral angles usually produced into short acute spines 

 slightly directed forward ; abdominal spiracles about equidistant 

 from the basal and apical segmental margins or nearer apical 

 margin, but much nearer to their lateral margins. 



