xiv SHORT ACCOUNT OF THE MORE IMPORTANT 



Family PsilidcB. 



Body elongate, with short hairs and almost without bristles. 

 Front with only a few bristles in the neighbourhood of the crown, 

 no bristles near mouth. Neuration complete ; auxiliary vein lies 

 close by the first longitudinal vein, but diverges from it at its end and 

 runs towards the border of the wing ; by a transverse fold, most 

 characteristic in this family, running from tip of auxiliary vein as far 

 as the base of the third posterior cell, the outward end of the auxiliary 

 vein is obliterated. Posterior basal cells large. 



Family Mia'opezidce. 



Body slender, with short hairs and very few bristles. Neuration of 

 veins complete ; first longitudinal vein bare ; auxiliary vein is very 

 close by it, and diverges from it towards its end only ; the two 

 posterior basal cells very large. A few bristles on the crown only ; no 

 vibrissse on the mouth-border. No bristle on outer side of tibiae. 



Family Ortalidcc. 



Auxiliary vein separated from the first longitudinal and running 

 to border of wing in the usual way under an acute angle and re- 

 maining perfectly distinct in its whole length ; third longitudinal 

 vein generally with coarse hairs. Two posterior basal cells large, the 

 outward one frequently prolonged in an acute angle. Front with 

 bristles on the upper part only. No vibrissce at the border of the 

 mouth. Clypeus very much developed. Middle tibiae alone with 

 spurs ; no bristle on tibiae. Ovipositor of ? flattened and horny, 

 composed of three elongated segments and ending in a simple 



point. 



Family TrypetidcK. 



End of auxiliary veins runs steeply to the border of the wing and 

 becomes obsolete ; first longitudinal vein always with bristles, the 

 third frequently, the fifth sometimes ; the hindermost posterior cell 

 produced to a point. Front on each side with two rows of bristles, 

 one above and placed interiorly, and one below. No vibrissa on 

 border of mouth. Clypeus none or rudimentary. Middle tibiae 

 only with spurs; no bristle present on tibiae. Ovipositor horny, as 

 in preceding family. 



Family Lonchccidce. 



Auxiliary vein runs to border of the wing in the usual way under 

 an acute angle and without becoming obsolete and near to the first 

 longitudinal vein ; this vein is bare. Two posterior basal cells small. 

 Front at each side with a single row of bristles. No vibrissas. 



