AMERICAN HYMENOFTERA. 255 



site the ocelli, a large maik on tlie face, extending from the top to near the bot- 

 tom and incised in the centre above, a small mark on the sides below the middle, 

 the clypens, mandibles, except at the apex, malar space, the scutellums and the 

 4 front legs lemon-yellow; the apical joint of the liind trochanters, the femora 

 and tibije dark rufous; the apices of the joints of the middle tarsi bh-ickish, the 

 anterior so to a less extent. Flagellum of antennte fuscous below. Wings hya- 

 line, the stignaa fuscous, the nervures darker colored. %. Length fully 5 mm. 

 Antennae clearly longer than the body. Head shining, the front closely punc- 

 tured, covered with a short pile. Mesonotum punctured in front. Metanotum 

 closely punctured, pilose, the centre shining. Pleurae closely and distinctly 

 punctured. Abdomen shining, impunctate, pilose; the base of the 1st segment 

 to near the middle, its sides and the apices of the other segments, narrowly, 

 lemon-yellow ; the yellow lines on the apical segments dilated in the middle. 

 The disco-cubital nervure is roundly curved ; the transverse cubital nervure is 

 long, oblique; the recurrent nervure is received about two-thirds of its length 

 beyond it. Hind tarsi stout, slightly longer than the tibiffi. 



Hub. — Mexico. 



C'ERDA gen. nov. 



Disco-cubital nervure angled ; broken by a stump of a nervure. 

 Areolet oblique, the transverse cubital nervures uniting in front; 

 the recurrent nervure received near the apex ; the cubitus angled 

 where it is received. Recurrent nervure broken by a short stump 

 of a nervure above the middle. Tran verse median nervure in hind 

 wings broken below the middle. Median segment with a large 

 areola, longer than broad, of equal width, transverse at the apex ; 

 there is a keel on the sides of the base of the metanotum and another 

 below the spiracles; the apical slope bounded above and on the sides 

 b}' a stout keel ; spiracles minute. Alxlomen .sessile, the sides keeled 

 throughout; the raised central part bounded by stout keels which 

 extend to shortly beyond the middle. The segments are smooth, 

 without depressions or furrows. The segments clearly separated ; 

 the apical bluntly rounded, curled downwards. Mandibular teeth 

 of equal length. Clypeus separated from the face; its apex l)roadl}i 

 rounded. 



Comes near to Frotarchas, which may be known from it by the 

 metapleune having a tooth Immediately above the hind coxae, and 

 by the hind wings having the transverse median nervure broken 

 above, not below, the middle. 



C'erda fiif^cipeniiiw sp. nov. 

 Eufous, smooth, shining, the ocellar region and the mesopleura; black. Median 

 segment covered with longish white hair. Apex of mandibles black, their base 

 yellowish. Legs densely covered with short, pale pubescence; the coxae broadly 



TRANS. AM. ENT. SOC. XXX. AUGUST. 1904. 



