C. EFFLATOUPI. 



Praescutellr {prsc.), 1 pair of bristles. on the hind margin, in 

 front of the scutellum, rarely wanting. 



Humerai (hm.), 1 bristle on the humerai calhis, rarely wanting. 



Noto pleural (npL), thèse consist of 2 pairs of bristles iuserted 

 above the dorso-pleural suture, in the notopleural dépression; they 

 are never absent ; the one behind the humerai callus is called anterior 

 and the one before the suture is called posterior; thèse 7ipl. {a.npl. 

 and p.npl.) are the post-humeral bristles of Osten-Sacken. 



Praesutural {prst.), one before the suture and above the prae- 

 sutural dépression, sometimes wanting. 



Supra-alar (sa.) thèse consist of 3 pairs; the pair behind the 

 suture, the anterior (a. sa.), is very rarely absent, and the 2 other 

 pairs, one above the root of the wing and the other on the post- 

 alar callus, the posterior (p. sa.), are always présent; the p. sa. are 

 also sometimes called postalar bristles. 



Pteroplevral {pp.), also known as the prothoracic, one bristle 

 situated in front of the anterior or prothoracic stigma. It is not 

 often présent. 



Mesopleural (mpl.), 1 or 2 bristles near the hind margin of the 

 mesopleura, sometimes accompanied by some bristly hairs. 



Pteropleural (pt.), 1 bristle on the pteropleura, beneath the 

 root of the wing, usually strong, but sometimes weak. 



Sternoplevral {st.), 1 bristle near the hind margin of the 

 sternopleura, very rarely wanting. 



The scutellum is usually triangular in shape (bxit it may be 

 semi-circular or even trilonate) its surface may be flattened or con- 

 yex. It bears usually 2 pairs of bristles but sometimes only 1 pair. 



Basai scutellar {h. se), 1 pair of bristles near the base, usually 

 stronger than the apical pair, divergent, very rarely absent. 



Apical scutellar {a. se.) 1 pair of bristles near the apex usually 

 weaker than the basai pair; they may be parallel, converging or 

 even crossed, more often absent. 



There is also rarely in the Oriental forms an iutermediate pair 

 of bristles between the basai and the apical. 



The pubescence of the thorax may be more or less distinct, 

 blacki.sh or pale yellow and sometimes stronglv developed; in ad- 

 dition the thorax usually bears a fine dust, pulverulence or tomen- 

 tum. 



ABDOMEN 



With 4 segments in the maie: it may l)e uarrow or elongate, 

 short and broad. or narrowed at tlie luise: the fii'st segment is very 

 long and composed of 2 segments fused together and in rare cases 

 ail tho abdominal segments arc fused together {Daciis loncjistylus, 



