1914.] NATIUAL SCir.NCES OK PlIlLADKI.l'm A. 580 



Plcursp, dorsal plt-urites purplish hrown, sicriuini lighter grayish 

 l)ro\vn, the two enclosing a broad light yellow stripe beginning behind 

 the fore coxa and ending ai)ove the hind coxa. Haltere.s pale brown, 

 the knob a little darker. Legs with the coxa^ and trochanters dull 

 yellow, femora anil tibiie j-ellow, the latter a little darkened at the 

 tip. tarsi dark i)rown. Wings light brown, stigma small, rather 

 indistinct, veins brown; venation (PI. XXVII, fig. 26): Sci far re- 

 moved from the tip of Sc,; cross-vein r rather indistinct at the fork of 

 li;^!.; cell .1/1 absent ; outer deflection of J/3 absent; basal deflection 

 of Cih at the fork of .U. 



Abdomen dark brown, the pleural line and the genital segment 

 yellowish. 



The paratype has the two ba.sal segments of the antennae yellowish, 

 the head behind graj', cross- vein r verj^ indistinct, basal deflection 

 of C«i before the fork of .1/. 



Holotype, 9 , Biscayne Bay, Dade Co., Fla. (Mrs. A. T. Slosson). 



Paratype, 9 , Paraiso, Canal Zone, January 29, 1911 (Aug. Busck). 



I was unable to detect tibial spurs on this insect. The general 

 ai>pcarance is more like that of a Luimophila than any other form 

 known to me and I refer it to Gonomyia with con.siderable doubt. 

 The long Sc and cross-vein ;• are not typical of Gonoimjia. 



Genus CLADTJRA Ostcn Sacken. 

 IS.59. Cladura O.'^ten Sacken; Proc. Acad. Nat. Sci. Phila., p. 229. 

 Cladura delicatula sp. n. 



From the onlj^ described American species, C. jlavo-ferrmjinca 0. S. 

 (= inclivisa 0. S.), this form dilTers in its very nmeh smaller size and 

 pale coloration. The spec-imensof indivisa mentioned by O-sten Sacken,- 

 where he states "some of the specimens, probably recently excluded, 

 were pale and without spots," may have belonged to this form. There 

 are no brown spots on the pleurte; the extreme lateral margin of the 

 abdominal tergites is dark; the wings are hyaline and lack the dark 

 markings on the cord, origin of the sector and on the outer deflection 

 of cell 1st 3/2. I have compared this insect with the extensive 

 series of Cladura studied by Mr. Leonard and myself and have no 

 doubt of its specific tlistinctness. The wing is figured in PI. XXVII. 

 fig. 27. 



Female, length, 4.6 4.7 mm.; wing, 5.6-5.7 mm. 



= Mon. Dipt. X. .\ni., vol. 4. p. 189. 



' Vcnational variation in Chuhira, Jotirn. .V. )'. Eiilomohgical Snritty, vol. 20, . 

 pp. .36-39, 1912. 



