210 EUUBA PENTANDBJE. 



4 (1) Pronotum black. 



5 (8) Mouth black. 



6 (7) Clypeus sharply incised, apex of abdomen and cerci brownish. 



August a. 



7 (6) Clypeus broadly incised, apex of abdomen and cerci black. 



Nigrii arsis. 



8 (5) Mouth white. 



9 (10) Tegulse black, cerci black. Nigritarsis, var. 



10 (9) Tegulse white. 



11 (12) Apex of abdomen and cerci brownish or testaceous. Saliceti. 



12 (11) Apex of abdomen and cerci black. Nigritarsis, var. 



1. EUURA PENTANDE^. 



PI IV, fig. 9, ? , 9a, Antenna; PL VIII, fig. 11, Larva ; 

 PL XI, fig. 1, Galls, fig. 6, Lar. full-fed. 



Cynips amerinte, Lin., F. Sv. Ed., ii, 1530. 

 Tenthredo salicis-pentandrce (Retz.), De Geer, Mem., ii, 1009, 



t. 39, f. 1-11. 



saliceti, Zett., Ins. Lap., 351, 49. 

 PristipJiora duplex, Lep., Mon., 61, 177. 

 Nematus medullaris, Htg., Blattw., 224, 4. 



populi, Htg., 1. c., 223, 3. 



buccatus, Thorns., Opus., 639, 54. 



pentandrtf, Thorns., Hym. Sc., i, 165, 100 ; Dbm., 



Clavis, 28, 38. < 

 Cryptocampus mucronatus, Voll., Tijd. Ent. (2), vi, pi. 12 ; Kalt., 



Pfl., 582. 



pentandrtz, Cam., E. M. M., xiii, 178 ; Fauna, 45, 



1 ; Andre, Species, i, 89 ; 

 Cat., 10,* 1. 



Head a little narrower than the thorax, black, shining, slightly 

 pubescent, smooth, front moderately projecting, vertical sutures dis- 

 tinct ; fovea deep ; apex of clypeus slightly incised ; clypeus in part, 

 labrum, mandibles (apex excepted) and palpi, testaceous-white, the 

 orbits, especially behind, brownish. Antennae thickish, compressed, 

 the joints distinctly separated, projecting and sharply cut off at apex, 

 covered with stiff pile; black, sometimes brownish beneath, the third 

 and fourth joints equal. Thorax black, shining, covered with fuscous 

 pile ; margin of pronotum with tegulse pale testaceous. Wings hyaline, 

 stigma pale fuscous, white at the base, rarely unicolorous. Abdomen 

 black, a little compressed ; anal segment and cerci testaceous. Legs 

 reddish-testaceous, base of coxae and femora more or less, lined with 

 black at the base ; hind tibiae fuscous at the apex. Claws with a 

 subapical tooth, patellae small. 



The < has the antennas compressed on the underside and testa- 

 ceous at apex, with the apex of abdomen and stigma fuscous. 



Length 2 2| lines. 



