560 



Antennae inserted a little above the line connecting tlie lower corners 

 of the eyes; scape reaching to the ocelli after shrinkage of the head, 

 compressed and about three times as long as wide, excluding the radicle; 

 pedicel nearly one-half as long as the scape and considerably wider at 

 apex than the following joints ; of the four ring-joints the first and fourth 

 are longest, the first somewhat wedge-shaped and a little shorter on the 

 inner side than the fourth, the second about one-fourth as long as the 

 fourth and the third about one-half as long; first funicle joint nearly 

 four times as long as thick and nearly equal to the next two joints 

 combined, the second and third funicle joints equal in length but the 

 third about a fourth thicker again than the second ; club oval, slightly 

 longer than the last two funicle joints combined and nearly a half wider 

 again than the preceding joint, its apical joint about a third longer again 

 than the basal joint and with a short, bluntly pointed nipj^le at apex. 

 Funicle and club with numerous stout long bristles, better developed 

 distad, the scape and pedicel with a few smaller bristles ; the bristles in 

 a transverse row near apical margin of the first joint of club, those in 

 a similar row at the middle of the apical joint and several scattero.l 

 near apices of the last two funicle joints considerably stouter than the 

 other bristles and much enlarged at base ; most of the bristles nearly or 

 quite straight, but others, especially the shorter bristles near aj»ex of the 

 club, rather strongly curved inward. 



Fig. 3. Antenna of female Ootetrastichus formosanus. 



Pronotum with a row of fine hairs along its posterior margin and 

 a second row just anteriorly consisting of about three fine hairs on 

 each side; mesoscutum with two or three pairs of hairs on each side near 

 the outer margin, the pair just in front of the posterior corners 

 slightly longer ; the parapsides each with a single bristle-like hair 

 near the posterior margin; sulci of scutellum very distinct, the sub- 

 median pair parallel ; two pairs of converging blackish bristles present 

 on the scutellum just outside of the submedian sulci; the anterior pair 

 just behind the middle and the other pair near the apex. 



Wings when closed reaching slightly beyond apex of the ovipositor; 

 front pair rather wide, very broadly rounded at apex, the marginal cilia 



