230 Transactions . — Zoology . 



Sub-section A. Cross-vein, if present, placed be- 

 tween the root and tip of the first longitudinal 

 vein . 



Sub-genus 1. Gonioclcma (Skuse). 



Antennae of female 2-f 11 jointed, verticillate, 

 pilose. Second longitudinal reaching margin 

 at the apex of the wing ; cross-vein distinct ; 

 third longitudinal not branched. 



Sub-genus 2. Cecidomyia (Loew). 



Second longitudinal vein reaches the margin 

 of the wing a little before its tip. Generally 

 the same number of joints in male and female, 

 the joints being pedicelled or sessile. 



Sub-genus 3. Diplosis (Loew). 



Second longitudinal vein reaches the margin 

 of the wing at or beyond its tip. Antennae of 

 male 2 -f 24 jointed; joints pedicelled; single 

 joints alternating with double ones, or all 

 joints simple. Antennae of female 2 -f 12 

 jointed ; joints cylindrical, pedicelled. 



Sub-genus 4. AsjjJioiidylia (Loew). 



Second logitudinal vein reaches the margin 

 of the wing a little beyond its tip. Antennae 

 of both sexes with the same number of joints ; 

 the latter cylindrical, sessile, with a short 

 pubescence and without verticils. 



Sub-genus 5. Homiomyia (Loew). 



Second longitudinal vein reaches the mar- 

 gin of the wing either at or beyond the tip. 

 Thorax more or less gibbose, frequently ex- 

 tending over the head in the form of a hood. 

 Joints of male antennae pedicelled, those of 

 female pedicelled or sessile. 



Sub-genus 6. Necroplilchia (Skuse). 



Second longitudinal vein reaching margin of 

 wing beyoiid its tip ; third longitudinal vein 

 without anterior branch. Antennae in female 

 2-1-12 jointed ; joints pedicelled, with two 

 verticils. 



Sub-genus 7. Chastomera (Skuse). 



First longitudinal vein very wide of costa ; 

 second longitudinal reaching margin beyond 

 apex of wing ; no trace of anterior branch of 

 fourth longitudinal. Antennae in female pedi- 

 celled, verticillate. 



