60 BULLETIN 826, U. S. DEPARTMENT OF AGRICULTURE. 



media; hind wings with both media and cubitus present. Cornicles somewhat swollen 

 near their distal extremities. Cauda elongate and constricted near the base. 



Type (mono typical), Macrosiphum Icirhaldyi Fullaway. 



Genus IDIOPTERUS Davis. 

 Plate. VIII, EE-HH. 

 1900. Idioptcrus Davis, Ann. Ent. Soc. Amer., v. 2, p. 19S. 



Idiopterus, a less specialized genus than Pentalonia, is worthy of 

 special note, as it gives a key to the peculiar venation of the latter genus. 

 The coalescing of the radial sector "and the media is here plainly 

 visible and in some specimens a triangular closed cell is formed r 

 although in most examples the two veins can be traced distinctly. 



Characters. — Head with prominent antenna! tubercles which project slightly in- 

 wards, and are gibbous. Antennae of six segments, armed with subcircular sensoria, 

 the first segment gibbous like the antennal tubercles. Cornicles subcylindric, rather 

 slender, Cauda somewhat elongate, conical. Fore wings with the radial sector extend- 

 ing abruptly downward from the stigma and paralleling the upper branch of the 

 media with which in some specimens it appears to be almost united; hind wings with 

 both media and cubitus present. 



Type (mono typical), Idiopterus nephrolepidis Davis. 



Genus MICROPARSUS Patch. 



Plate VIII, AA-DD. 

 1909. Ificroparsus Patch, Ent. News, v. 20, p. 337. 



Microparsus is at once distinguished from the other genera related 

 to it by the peculiar venation and the reduction of the hind wing. 



Characters. — Head Avith distinct antennal tubercles present. Antenna? of six seg- 

 ments, armed with subcircular sensoria. Fore wings with the media once branched; 

 hind wings much reduced in size and lacking both the media and cubitus. Cornicles 

 subcylindric. Cauda rather long and tapering, almost equal in length to the cornicles.. 



Type (monotypical), Microparsus variabilis Patch. 



Genus NEOTOXOPTERA Theobald.i 



1915. Neotoxoptera Theobald, Bui. Ent. Res., v. 6, p. 131. 



This genus is closely related to Fullawayella, from which it can be 

 separated by the venation. There has been some doubt whether or 

 not this is a good genus, for the name will not hold if the type is found 

 to correspond with Pergande's violae, which it resembles. In that 

 case Neotoxoptera would become a synonym of Fullawayella, for 

 Pergande's species is undoubtedly a Fullawayella, 



Characters. — Head with prominent antennal tubercles. Antenna? of six segments, 

 armed with subcircular sensoria. Fore wings with the media once branched. Corni- 

 cle3 swollen, elongate, somewhat conical. 



Type (monotypical), Neotoxoptera violae Theo. 



1 After this paper was in type the writer (Bui. Ent. Res., v. 10, p. 45) showed that violae Theo. is a. 

 synonym of violae Perg. 



