BY FREDERICK A. A. SKUSE. 227 



Section I. Chironomina. 



Head small, transverse, situated deep in thorax. Eyes more 

 or less reniform, separate in both sexes (approximate beneath in 

 Clunio). Ocelli wanting. Palpi porrected, pubescent, sub- 

 cylindrical, curved, four-jointed ; first joint very small, second 

 and third moderately long, of equal length, fourth as long or 

 longer (wanting in Clunio). Proboscis short (obsolete in Clunio). 

 Antennae porrect^ normally 2- + 12-jointed in (J, 2- + 5-jointed in 

 9, rarely with an equal number of joints in both sexes ; first joint 

 of the scapus large, globose or disciform, the second small ; in ^ 

 usually as long as thorax, densely plumose, the verticils 

 diminishing in length towards the extremity ; first eleven 

 flagellar joints extremely short, terminal joint filiform, very 

 long; in ^ usually about half the length of thorax, flagellar 

 joints ovate, oblong, or elongate-pyriform, increasing in length 

 from first, sparingly verticillate-pilose, terminal joint slender, 

 pilose. Thorax ovate or elongate-ovate, gibbose, more or less 

 projecting in front, usually with three dark stripes; scutellum 

 small, semicircular; metathorax prominent. Halteres short. 

 Abdomen eight-segmented ; long and slender in (J, anal joint 

 distinct, forceps prominent, generally falcate or filiform ; in 9 

 shorter and more robust. Legs more or less long and slender, 

 anterior -pair remote from the others ; coxae short ; tibiae more or 

 less confluently-calcarate at apex ; as long, longer or shorter than 

 metatarsus ; ungues small. Wings narrow, elongate, lanceolate, 

 more or less rectangular at base, naked or pubescent, ciliated ; 

 deflexed in repose. Humeral cross- vein present. Sub-costal 

 cross-vein always (?) absent. Marginal cross-vein wanting. 

 Posterior transverse- vein wanting. Auxiliary vein usually pale 

 and indistinct, often scarcely reaching costa about middle of 

 anterior border or beyond it. Costal usually terminating at 

 tip of third longitudinal vein, sometimes extending a little 



