BRÉTHES: HIMENÓPTEROS DE LA AMÉRICA MERIDIONAL. 79 
Iphiaulax strigator BRETHES, n. sp. 
Q Ruber vel ferrugineus, genis macula etiamque orbitis internis 
prope basin antennarum flavis; capite, antennis, sterno, pedi- 
bus et valvis terebrae mgris, alis mgris, stigmate migro, cellulis 
cubitali 1.2 linea, discordali-postica basi et contra venam 
transverso-cubitalem 2.2% hyalinis. Long.: S mm. Antennaec: 
6,5 mm. Terebra: vix 3 mm. 
Politus, facie sat sparce punctulata, in medio longitrorsum ele- 
vatula, genis modice longis, lineis parapsidalibus distinetis, seg- 
mento mediario in medio postice vermiculato, abdomine segmen- 
to 1.* area media longitrorsum et utrinque cristata, transverse 
striata, impressionibus longitudinalibus transverse striatis, segmen- 
tis 2-4 longitudinaliter striatis, segmento 2.” area media basi po- 
ligonali deim carinata, impressionibus discalibus margine exteriore 
profundius impresso, imo apice segmenti polito, segmento 3. apice 
polito, area antero-laterali subtiliter transverse striolata, segmen- 
to 4. vix dimidio apicali polito, segmento 5.* dimidio basali sub- 
tiliter longitrorsum striolato, apice abdominis polito. 
1 2 de Potrerillo.—Col. Mus. Nac. Buenos Aires. 
Iphiaulax laetabilis BRETHES, n. sp. 
3 Niger, thorace dimidio postico et abdomine usque ad dimidium 
segmenti 6. ferrugineis, alis fuscis, anticis stigmate fusco, 
cellulis cubitala 1.2 transverse, discordali-postica basi et contra 
venam transverso-cubitalem 2.2% hyalinis. Long.: 7 mm. 
Politus, facie punctulata, longitrorsum obsolete elevata, genis me- 
dioeribus, lineis parapsidalibus distinetis, abdomine segmento 1.” area 
media paulum concava, utrinque eristata et lateralem versus paulum 
transverse striata. crista antero-laterali extus etiam paulum striata, 
segmento 2. polito, area media basi triangulari dein ceristata, im- 
pressionibus discalibus anticem versus eradatim impressis et longi- 
trorsum modice striatis, segmentis 3. 4. que basi striatis, 3.2 area 
antero-laterali medium versus paulum elongata. 
1 g ¿de la República Argentina ?—Col. Mus. Nac. Buenos Aires. 
