CHRYSOPILIN.^ 295 



CHRYSOPILINiE. 



Antennre with the third joint simple, and bearing a long apical or 

 subapical arista or a style of varying stoutness and length. Face socketed. 

 Middle tibise with two apical spurs, but the hind tibiae with only one. 

 Wings with a long cubital fork. 



This subfamily is very closely allied to the Leptincc, and the only 

 certain character lies in the presence of only one spur to the hind tibiae, 

 and even that is indistinct in Sjjania and Hilarimorpha. There are 

 however several characters which assist in separating the two subfamilies, 

 such as the almost universal rule that in the males of the Chrysopilince 

 the facets on the upper part of the eyes are conspicuously larger than, 

 and are separated in a horizontal line from, the smaller facets on the lower 

 part, the only exception I know being Symioliofomyia immaculata ; the 

 Chrysopilinw also derive their name through the species of Chrysopilus 

 bearing a conspicuous adpressed golden pile on the thorax and abdomen 

 (which is very easily rubbed off) ; and many genera have the end of the 

 antennee provided with a style instead of an arista, but this style varies 

 considerably in stoutness and length; the cubital fork also is different 

 from the type of the Leptincc and is sometimes almost wholly above the 

 wing-tip, while even in the closely allied Chryso2nlus there is a delicate 

 distinction in the shape of this fork as it is rather narrower on the basal 

 part, though the smaller species of Leptis {L. lineola, etc.) approximate in 

 this character. 



The genus Hilarimoipha, which has no discal cell and only four 

 posterior cells, the cubital fork short and placed above the wing-tip, the 

 tibial spurs all stunted, and the pulvilli two only, may possibly not 

 belong to this subfamily, but being eremochsetous must belong to the 

 Leptidm. 



5. SYMPHOROMYIA. 



Symplioromyia Frauenfeld, Verh. zool.-bot. Wien., xvii., 496 (1867). 

 Allied to Atkerix and Atrichops in the form of the antencse, 

 but the hind tibiae with only one spur and the anal cell open. 



Head broader than the thorax in both sexes, not so much flattened as in Atherix. 

 Face longer than in Atherix, and with broad side-cheeks which may be bare 

 ('S'. crassicorms) or which may have a slight pubescence {S. immaculata) or even 

 long dense pubescence {S. mekeria). Frons in the male small, or large and inflated 

 {S. melcena), and either bare or with long dense pubescence, but in the female 

 always broad and bearing numerous short bristles. Palpi porrect and bristly, 

 rather drooping at the tip. Eyes in the male either just touching or only closely 

 approximated on the frons, but in the female very widely separated. Antennae 

 wide apart at the base, and with the third joint kidney -shaped (figs. 195, 196); 

 arista apparently subapical as it is inserted well above the most prominent part 

 of the third joint, long and thin, two or three times as long as the antennas. 



Thorax normal in shape and bearing fairly equal but hardly dense pubescence 

 which is rather long in the male but short in the female, and this pubescence is 

 hardly of a bristly nature anywhere. Pleurae with a rather dense tuft of pubescence 



