36 PROCEEDINGS OF THE NATIONAL MUSEUM. vol.xxhi. 



36. Basal area and areola wanting (223) Phatnacra Forster. 



Ba«al area and areola present, or at least the areola is jiresent. 



Last joint of the hind tarsi hardly one-third longer than tlu* finirth ;!7 



Last joint of the himl tarsi liardly one-fifth longer than the fourth; anterior 

 margin of the elypeus not truncate. 

 Seeond abdominal segment irith sharp well-<letined thyridia. 



(224) Ethi'lunjitx FiW-ster. 

 Second abdominal segment iiuthonl thyridia. . (225) Zoo]>}ithorus F(")rste<-. 



37. Transverse median nervure in hind wings broken heloii' the middle 38 



Transverse median nervure in liiud wings broken at the middle. 



(226) Diatora Forster. 



38. First three abdominal segments transversely impressed.. (227) Encrates Forster. 

 First three alxlominal segments not transversely impressed. 



Clypeus not separated, quite flat, anteriorly truncate or medially projec-ting 



and feebly margined (228) AdlaKtohi F(')rster. 



Clyi>eus more or less distinctly separated. 



Metathorax vntJiGut two regularly formed transverse carin^e 39 



Metathorax inith two transverse carinpe, but -nilhovt a closed areola. 



(229) Ixdronms Forster. 



39. Second abdominal segment not finely, longitudinally aciculate 40 



Second abdominal segment finely, longitudinally aciculate; metathorax l)iden- 



tate, the areola in the male as long as the petiolar area. 



(230) Oojmonis Foi'ster. 



40. Al)scissa of tiie cubitus behind the transverse discoidal nervure so strongly bent 



upward that it extends parallel with the transverse cubitus. 



(231) Urithrrptuif Forster. 

 Abscissa of the cubitus l)ehind the transverse discoidal not parallel with the 

 transverse cubitus. 



Head l)ehind not very much narrowed 41 



Head behind very much narrowed (232) IloniteJi's (xraveuhorst. 



41. Metathorax witli the spiracular area irith a sharp carina within. 



(233) Enj)lan)ig Forster. 

 Metathorax with the spiracular uraa vithout a shari) carina within; first al)dom- 

 inal segment iritJiovt a sharp carina extending from the spiracles 

 to apex. 



Clypeus Mith the anterior margin not inqjressed medially; abscissa of the 

 cubitus lying behind the transverse discoidal nervure and ex- 

 tending imrallel with the second abscissa of the radius; ocelli 

 in male not close to the eyes (234) IsocliresUt, Forster. 



Clypeus with the anterior margin medially impi-essed; abscissa of the cubitus 

 lying l)ehind the transverse discoidal ner%iire but strongly con- 

 vergent with the second abscissa of the radius; ocelli in male 

 ver'v close to the eyes (235) Cliaritopes Forster. 



Tribe IV. PEZOMACHINI. 



1868. PezonmchoUliv, Family 23, Fcikstek, \ erh. d. natui-li. Ver. pr. Rheinl., 



XXV, pp. 144 and 173. 

 1S73. Ilemitdhui, Tribus Thomson (part). Opus. Ent., Y. p. 468. 

 1900. Pezoinnchini, Tribe IV, Ashmeap, Smith's Insects of Ne.AV Jersey, p. 569. 



This tril)o is here restricted to species having ii non-areolated meta- 

 thorax, or at most with only a transverse apical carina. The siil)- 

 apterous females with an areolated metathorax are removed to the 



