MACHOBBACHIT7S. 109 



Near Phronia. Head placed low down on thorax ; palpi incurved, 

 four-jointed, first two joints caliciform, 3rd joint cylindrical, 4th 

 nearly as long as the first three taken together. Eyes oval, 

 ernarginate at base of antennae ; three ocelli, placed in a transverse 

 line, the middle one small. Antennae articulate, 16-jointed, scape 

 differentiated, flagellum cylindrical. Thorax short, highly arched, 

 metanotum short, scutellum small, with long setse. Abdomen 

 short and compressed, in male 6-segmented, in female 7-segmented* 

 Legs strong; middle and hind tibiae with two rows of lateral setae 

 on each. Wings oval, broader at base in the male ; costa ending 

 far beyond tip of 3rd longitudinal vein ; auxiliary vein short, a 

 little curved, the end free ; the 4th vein forking beyond the basal 

 section of the 3rd vein ; the fork of the 5th longitudinal small, 

 the fork, far beyond the fork of the 4th ; branches widely 

 diverging ; the 6th longitudinal vein long and strong, but shortened ; 

 the 3rd vein beginning before the middle of the wing ; the 

 anterior cross-vein moderately long, very oblique, the 4th vein 

 forking immediately after quitting it. 



Range. Europe ; Eastern Himalayas. 



The long costa, in conjunction with the strong 6th vein, at 

 once separates this genus from Phronia. 



63. Macrobrachius longicosta, sp. nov. (PI. Ill, fig. 11.) 



c? . Head : vertex and frons black, with greyish pubescence ; 

 face very narrow, owing to the eyes being nearly contiguous just 

 below the antennae. Palpi pale yellow; scapal joints of antenna? 

 bright yellow, each with a row of bristles ; 1st flagellar joint 

 yellow at base, the remainder brown, darkening nearly to black at 

 the tip. Outer ocelli touching the eyes. Tliorax bright brownish 

 yellow, with very short golden yellow pubescence and numerous 

 strong bristly hairs, which latter are more conspicuous towards the 

 margins and along the middle, where they form two dorso-central 

 rows ; two brown, rather broad, longitudinal stripes beginning on 

 the hind margin of the dorsum, but disappearing before reaching 

 the middle. Prothorax with four strong bristles on each side. 

 Scutellum sub -triangular, the upper corners rounded, blackish, 

 with short yellow hairs and two divergent strong bristles at the 

 tip ; underside yellowish. Metanotum blackish, sides of thorax 

 yellow,' pleurae blackish. Abdomen considerably compressed, six- 

 segmented, black, with yellowish grey pubescence ; belly yellowish. 

 Genitalia yellowish ; a short narrow emarginate dorsal plate, 

 apparently united to the very large side-plates (unless these are 

 the basal joints themselves of the claspers) and these meet below, 

 forming a keel-shaped cavity for the inner organs, the tip prolonged 

 narrowly as a ventral style, with three horny filaments. From 

 the genital chamber project three tapering finger-like appendages, 

 each ending in a horny hook ; they are united at their bases and 

 apparently form the second joint of the claspers, the first being 

 hidden (unless they themselves are what are here described as 



