84 BULLETIN 826, TJ. S. DEPARTMENT OF AGRICULTURE. 



Genus HORMAPHIS Osten-Sacken. 

 Plate XIV, Y-FF. 

 1861. Hormaphis Osten-Sacken, Stettiner Ent. Zeit., p. 422. 



The genus Horrnaphis was erected by Osten Saeken for a species 

 he described as Tiamamelidis. This species it later proved was the 

 sarme described by Fitch as Byrsocrypta Tiamamelidis. The genus 

 later was made to include spinosus Shimer, but the distinction 

 between this genus and the one described by Shimer has been 

 pointed out by Pergande. 1 



Characters. — Cornicles absent; aleyrodiform generations developed; wax glands 

 very numerous; stem mother with three-segmented antennae; alate forms with three- 

 segmented antennas which are armed with distinct annular sensoria. Wings held 

 flat in repose; fore wings with the media simple; hind wings with the cubitus 

 absent. Sexual forms small and apterous, possessing beaks, oviparous female laying 

 several eggs. 



Type (mono typical), Hormaphis Tiamamelidis 0. S. (Byrsocrypta hamamelidis Fitch). 



Tribe OREGMINI. 



Characters. — Forms living in galls or otherwise upon the leaves of plants, possess- 

 ing cornicles and wax secreting glands. Antennae of the winged forms usually armed 

 with annular sensoria; cauda rounded or somewhat knobbed, anal plate somewhat 

 bilobed. No aleyrodiform generations developed. The sexual forms appear to be 

 unknown. 



Key to the Gexera of the Oreomixi. 



1. Vertex with two horn-like projections 2. 



Vertex without such horn-like projections , 3.' 



2. Antennae five-segmented .Oregma. 



Antennae four-segmented Ceratoglyphina. 



3. Antennae of apterous form with five segments 4. 



Antennae of apterous form with four segments Glyphinaphis. 



4. Media of fore wings once branched Astegopteryx. 



Media of fore wings simple Mansakia.' 



Genus ASTEGOPTERYX Karsch. 

 Plate XV, Q-X. 



1S90. Astegopteryx Karsch, Ber. deutsch Botan. Ges., v. 8, p. 52. 



1906. Nipponaphis Pergande, Ent. News, v. 17, p. 205. 



1916. Schizoneur aphis Van der Goot, Zur Kenntniss der Blattlause Java's, p. 245. 



The genus Astegopteryx was erected with styracophila Karsch 

 as type. Another species, nekoasM, was described by Sasaki before 

 the International Congress at Brussels in 1911 and a third species, 

 styraci, was described by Matsumura in 1917. It is possible, there- 

 fore; to gain a fair conception of the characters. In 1906 Pergande 

 erected his genus Nipponaphis with distydiii Perg. as type. This 

 species was stated to be from DistycTiium racemosum in Japan, on 



1 Pergande, T. The life history of two species of plant lice inhabiting both the witch-hazel and birch. 

 U. S. Dept. Agr. Bur. Ent. Tech. Ser. no. 9. 1901. 



