neic Genera of Ichnciunoniilir. 485 



the niiddlo of the inesonotum, scutelliiin, postscutclluin, n 

 large mark, rouiiilfil on the outer side, straight on the inner 

 side, on tlic apex of the nieilian .scgnioiit, a line on the lower 

 edge of the |>ioj)h'nr:e, the tuhereles, a large elongated nruk 

 of almost e(|nal witith on the hiwer side of the njesopleurie, 

 and a small mark under the hind wing-*, y(dlo\v. Mcsonotuni 

 shagrcened ; the scutellum sparsely punctured. The centre 

 of the median segnient is smooth at the base ; the supra- 

 median area is longer than broad, bulges out below the middle, 

 inside it is finely irregularly striated ; the ]).)sterior median 

 area is stoutly transversely striated ; the others are strongly 

 punctureil, except the inner side of the outer lateral, which 

 is transversely Hnely striated. Propleura? shining, the lower 

 apical part striated. ^lesopleurte closely but not strongly 

 punctured ; the apex on the lower side is depressed, the 

 depression with some stout keels. Metapleuraj more closely 

 and strongly punctured; behind the curved keel striated. 

 Mesosternum closely punctured, the furrow triangularly 

 widened at the apex and crenulated. Legs rufous, the four 

 anterior coxie and trochanters yellow; the hinder coxje black, 

 as are also the basal joint of the trochanters, the apices of 

 tlie tibiie and femora, and the apex of the second joint and 

 the whole of the apical three joints of the hinder tarsi, this 

 being also the case with the tour front tarsi; the claws are 

 rufous. Wings hyaline ; the stigma fuscous, the nervures 

 paler ; the areolet at the top is hardly one half the length 

 of its lower side; the recurrent nervure is received in the 

 middle. Abdomen black ; all the segments marked with 

 pale yellow laterally at tlie apex ; the yellow mark on the 

 petiole is large, dilated at the apex ttn the outer side, and these 

 maiks are united at the apex by a narrow line ; the marks on 

 the second segments are large, broad, on the third narrower 

 and longer; on the other segments they are continuous; the 

 ventral fold is yellow. 



Gyrodonta, gen. nov. 



Mandibles short, broad, their apices bluntly rounded, 

 without teeth, the lower side at the base projecting down- 

 ward and clearly separated. Head large, broad, largely 

 develo[R'd behinti the eyes, and almost transverse bchinil. 

 Kyes parallel, widely distant from the base of the mandibles 

 above, if anything reaching above to the level of the vertex; 

 the lower edges are sharply keeled. (Jlypeus not separated 

 by a distinct suture from the face, its foveie distinct, its apex 

 bluntly rounded. Labrum projecting, distinct. Antenna} 

 thicker than usual; the apical joints of the Hagellum longer 



