Aphidiilae of Forumsa. — I. 61 



Legs Avith some inodemtely long setae; tarsi rather long. 

 Length of body — 1.7 mm. Antenna — 0.8 mm. 



Winged viviparous female. 



Green. Head, eyes and mesothorax black. Antennae black, 

 except the base of the 3rd joint green. Wings hyaline, stigma and 

 veins gray. Cauda green. Femora Itlack, except the bases green; 

 tibiae brown, with black apices; tarsi black. Body witliout hairs. 

 Frontal tubercles absent. Antennae without hairs; the 3rd joint 

 somewhat imbricated, provided with 37 large or .small, circular or 

 oval sensoria scattered over the whole length; the 4th joint provided 

 with 11, the 5tli joint 3+1 sensoria; the relative length of joints as 

 follows: III-62, IV-23, V-IO, VI-5G (11+45). Rostrum reaching 

 the middle legs. Prothorax with a veiy small lateral tuljercle; 

 abdomen without lateral tubercles. Wings normal; subcosta provided 

 with 5 sensoria on the distal half; hind wings with 2 parallel obUques; 

 booklets 3. Cornicles ver^- small, about twice as long as wide, 

 imbricated, very slightly swollen. Cauda large, triangular when seen 

 from above, a little longer than wide, 3 times as long as the cornicle, 

 almost subequal in length to tlie 4th antennal joint. 

 Body — 1.5 mm. Antenna — 1.3 mm. 



Fore wing — 2.3 mm. 



Hosts. — Apium graveolens ; Heracleum sp. 



Distribution. — Formosa (Taihoku, Ako, Kagi). 



Many winged females and their nymphs were collected by Mr. S. 

 Isshiki in Ako in March, 1921. 



This new aphis is distinguished from B. strllan'ae Hardy in the 

 structure of the antennae. 



Brachysiphoniella n. g. 

 Body oval, not elongated, without prominent hairs. Frontal 

 tubercles absent. Eyes normal. Antennae much shorter than the 

 body, 6-jointed; spur longer than the base. 



