146 C. H. TYLER TOWNSEND. 



First and second veins widely distant at their extremities, the second vein 

 reaching margin very slightly before exact middle of wing tip; usually 

 same number of joints in % and 9 antennte, the joints either pedi- 

 celled or sessile in both sexes, or pedicelled in % and sessile in 9 • 



Cecifloniyia. 



7. — Mouth parts prolonged into a rostrum subgen. Clinorliyiielia. 



Mouth parts normal Lasioptera. 



8. — Third vein simple, without fork; second vein forming a curve before cross- 

 vein and much curved backward at its extremity, reaching margin 

 beyond tip of wing; cross-vein rather large, oblique; joints of 9 au- 



tennse pedicelled* o C-oIpOflia. 



Third vein furcate 9. 



9. — Antennfe with same number of joints in both sexes; second vein reaches 

 maigin a little beyond tip of wing; antennal joints cylindrical, sessile, 



with a short pubescence, not verticillate AsptlOiidylia. 



Antennae with a different number of joints in % and 9 '■> second vein 



reaches margin either at or beyond tip of wing 10. 



10. — Antennae of % usually 26-jointed, of 9 H-jointed, sometimes in either 

 case with one rudimentary joint more; joints in % pedicelled, alter- 

 nately single and double, rarely all simple; in 9 pedicelled, cylindrical. 



Diplosis. 

 Antennae of % 14- to 36-jointed, slender, joints flagellate, pedicelled, verti- 

 cillate, either rounded or elongate, the petioles very often widened and 

 capitate below the joints; if the joints are doubly verticillate, then the 

 upper verticil or whorl is longer than the lower; antennae of 9 usually 

 thick and heavy, 14- to 24-jointed, with short verticils, formed as in 

 Diplosis, either acaulate or with short pedicels; thorax more or less gib- 

 bose, frequently extending over the head in the form of a hood. 



o Horinoiiiyia. 

 11. — Second vein almost straight before the cross-vein ; joints of antennae sessile, 



or nearly so in both sexes o Dirliiza. 



Second vein distinctly sinuate before cross-vein ; joints of antennae variable 



in number and pedicelled in both sexes o Epidosis. 



12. — Ocelli present , 13. 



Ocelli absent; third vein forked, first vein very short, wings pubescent, 

 antennae 11-jointed in both sexes, moniliform, verticillate in %, and 



submoniliform, pubescent in 9 o C'eciclogona. 



13.— Third vein forked 14. 



Fourth vein forked; antennae 11- to 20-jointed; in '^ moniliform, pilose, 

 joints pedicelled ; in 9 submoniliform, pubescent, joints sessile. 



Campy loiuyza. 

 14. — Upper branch of fork of third vein forming a double curve, somewhat in 

 shape of an S. lower branch in straight line with praefurca. 



Tritozyga. 

 Tipper branch of fork forms a single light curve; % antennae 16-jointed, 



verticillate, joints pedicelled 15. 



15. — Antennae of 9 10-joiuted, pilose, joints moniliform; second vein reaching 



apex of wing o Catocha. 



Antennae of 9 11- to 12-jointed, joints sessile; second vein terminating on 

 front border of wing, at one-fourth distance before tip..o L.estreiuia. 



* A single European species only has been described. The % is unknown. 



