TKICHOCERA. 509 



head and thorax together, very slender; scapal joints very short; 

 the flagellum of cylindrical joints, fourteen in number, becoming 

 very attenuated towards the tip, the joints being almost indistin- 

 guishable.* Thorax moderately oval and convex, suture distinct, 

 post-sutural longitudinal depression very wide and shallow. 

 Abdomen normal, linear. Genital organs of male consisting of a 

 basal subcylindrical joint and a second movable elongate fleshy 

 cylindrical joint. Ovipositor of female peculiar, owing to the 

 convex side of the arcuated valves being uppermost, the concave 

 side being below. t Legs slender, practically bare ; tibiae with 

 spurs at the tips, empodia distinct. Wings moderate in size, 

 comparatively broad. Two submarginal cells and five posterior 

 cells ; discal cell present, generally pointed at the proximal end ; 

 subcostal cross-vein before the middle of the wing, but a little 

 way after the origin of the 2nd longitudinal vein ; the marginal 

 cross-vein just after the fork of the 2nd vein, of which the 

 prsefurca forms about half its entire length ; emergence of 3rd 

 vein from the 2nd sometimes rectangular, sometimes almost 

 punctiform. Anterior branch of 4th longitudinal vein forked, 

 posterior cross-vein situated near the end of the discal cell. The 

 7th vein very short, curved suddenly into the margin of the wing 

 at its tip ; 1st posterior cell with nearly parallel sides, 4th 

 posterior cell sometimes pointed at the proximal end, normally 

 rectangular. 



Range. Europe, Asia Minor, the Orient, North America, 

 Auckland Is. 



After considerable deliberation I venture to remove this genus 

 from the LIMNOPHILINI to the AMALOPIKI, to which section I am 

 convinced it is much more closely allied : (1) by the pubescent 

 eyes, a peculiar character of the AHALOPIXI only ; (2) by the con- 

 spicuous frontal gibbosity, also almost peculiar to this section ; 

 (3) by the position of the subcostal cross-vein, which in this 

 section is normally before the origin of the 2nd longitudinal vein, 

 whereas, although in the present genus it is situated a little 

 beyond the origin of the 2nd vein, it is still nearer its technical 

 position than it would be in LIMKOPHIUNI, where it is always 

 situated at or near the tip of the long auxiliary vein. .Finally, 

 the general appearance of Trichocera appears to me more akin 

 to Amalopis than to any other genus; the broader wings, the 

 often pointed shape of 'the bases of both the discal cell and 

 the penultimate posterior cell in some of the species, being also 

 points in common. 



* Most authors have either quoted the number of joints of the antenna) 

 incorrectly, or left the number doubtful. 



t Osten Sacken says of this organ : " The ovipositor of the female is distin- 

 guished from all the ovipositors of the TIPULID,E by being reversed," and 

 observes that it is strange that no previous author had noticed that fact. 

 Moreover, the pubescence of the eyes, a very distinguishing character, con- 

 sidering that the eyes in most TIPULID^E are bare, was also overlooked by 

 various authors for many years after its announcement by Meigeu. 



