210 [September, 



having been overlooked in specimens mounted on their sides between 

 glass. This last error was detected on examination of unmounted 

 fresh examples in 1894. 



Sub-Family I, PSTCHODINiE. 



Subcosta met at an acute angle by the radio-cubital nerve-trunk close to the base 

 of the anterior basal cell. Posterior basal cell obtuse at its inner end. Anal-axillar 

 trunk continuous with the anal nervure ; axillar ncrvure well developed. Medias- 

 tinal nervure usually abrupt and linked by a cross vein, at or near its end, to the 

 subcosta alone ; in the absence of a cross vein it ends in the subcosta. Cubitus 

 present ; hence at the wing's apex two simple nervures intervene between the forked 

 nervures. Eyes excentrically reniform, approximate at the vertex. Inferior ^ 

 genital appendages borne at the extremity of a relatively large forceps-basis or 

 subgenital .plate (representing their basal joints connate), with which the perinseum 

 is blended ; the anal valve between them is median and terminal ; their single free 

 joints are armed with at least one tenacular spinule apiece. A pair of penis sheaths 

 present sometimes. Flies inoffensive. 



Sub-Family II, PHLEBOTOMIN,^. 



Subcosta met at right angles, very nearly in the middle or beyond the middle 

 of the anterior basal cell, either by the flexed stem of the radius or by a cross vein 

 from the radio-cubital nerve-trunk. Posterior basal cell acutely cuneiform. Axillar 

 nervure (sometimes absent) continuous, when present, with the anal-axillar nerve- 

 trunk. Mediastinal nervure confluent at its extremity with either the costa or the 

 subcosta, usually ending therein with a bold curve and linked by a cross vein, placed 

 at the commencement of the curve, to the opposite nervure. Cubitus absent in the 

 British genera, but in Phlebotomus long-stalked, i. e., confluent with the radius far 

 beyond the anterior basal cell. Eyes rotund or oval, distant at the vertex. Inferior 

 1^ genital appendages, when free, 2-jointed, and in this case the perinaeum is free 

 also, and in proportion of considerable size ; when the basal joints are connate, the 

 resulting forceps-basis or subgenital plate is very small. An under penis-cover and 

 the upper penis-sheaths sometimes developed. Flies blood-suckers on occasion ; 

 but, judging from experience, only PJdehotomus in Europe and N. Africa is 

 obnoxious to man. 



Ulomyia (Haliday, MS.), Walker (1856). 



Syn. Saccopteryx (Hal., MS.), Cui-tis (1839), pre-occupied. 



Refer ante, 2nd ser., vol. iv, p. 32, analytical key, step 4, and p. 

 31, woodcut fig. 1 ; also vol. v, pi. i, figs. U, ^ and $ (details). 



Aflinitics very near the 1st Section of Pericoma ; distinguished by sexual 

 differences in the wing, and a difference in the extent of the bristling hair on the 

 pobrachial branches. 



S . Wing-pouches formed as follows : — Very near the end of the basal cell, the 

 stem and strongly arched anterior branch of the pobrachial, together with the 

 gently arched posterior branch of this nervure, distend a pouch one-quarter the length 

 of the wing, protuberant above and open beneath, bounded in front by the prae- 



