1904.] 57 



and its Supplement, previously publislanl in Lliis VLigazino in tlie volumes ("or the 

 years 1893 to 1898. Description of uew species is also as nuicii as possible postponed 

 until illustrations of tlieir details can be pi'oduced — a work that will occupy many 

 months to come. 



Psychoda, auctorum, in 1898, was the gonerical name applied to all flies 

 having: — (J antcnnaj 14- to 16-jointcd, with nodose flagellum composed of full- 

 sized joints as far as the 13th jt)int of the antenna, followed by 1, -, or 3 diminutive 

 joints, and furnished with hair inserted upon the symmetrical or subsymmctrical 

 nodes in verticils constituting a series of 11 long haired verticils closely moniliform, 

 the 11th including the diminutive joint or joints. Wings ovate lanceolate, acute at 

 the end of the median vein ; subcosta very short and rudimentary, ending in the 

 radius, and not linked to the costa. Among these I propose to distinguish 

 European genera. 



Philosepedon, gen. nov. 



External ? genitalia short and obtuse {cf., Ent. Mo. Mag., 2nd ser., vol. v, pi. 

 iv, Ps. 6, 9 c) ; the subgenital plate slightly narrowed from the base, and slightly 

 emarginate at the tip. Antennae of c7 16-jointed, with the last 3 joints diminutive : 

 palpi lax, filiform, the 1st joint shorter than the 2nd, and this shorter than the 

 3rd, which is the longest when not subcqual to the 4th. Inf. app. ^ subequal in 

 length to their basis, stout and bitenacuiate, with long narrowly cuneate spinules. 

 Radius without bristling hair, the ranks of which terminate at or opposite the fork 

 on the sectors, and near the wing-margin on the anterior cubital branch and the Ist 

 and 2rd anal veins. 



Type, Ph. humeralis (Hoffmannsegg, MS.), Meigen. 



In the other genera, the ? has a rostrate ovipositor ; and the radius has 

 bristling hair. 



Thbeticus, gen. nov. 



Inf. app. (? short and stout, usually obclaviform and tapering to a point, and 

 subequal in length to, or very little longer than, their basis ; their tenaculse rela- 

 tively long. Palpi filiform, the last three joints elongate, sometimes subequal to 

 each other in length, or the 3rd may be by very little the longest. The ranks of 

 bristling hair on the radius, the forked and the simple sector, the anterior cubitus, 

 and on the 1st and 3rd anal veins terminate near the wing-margin. The name of 

 the genus has reference to the activity of the flies when they find themselves in the 

 net. 



Threticus lucifugus, Haliday, has tritenaculate inf. app. <? , and a subtriangular 

 ? subgenital plate acutely excised at the apex with subobtusc points. 



Threticus compar., sp. nov. 



(J, inf. app. unitenaculatc. Basal joint of <? app. sup. stout, oblique at the tip, 

 shorter than the falcate 2nd joint, which is stout and externally gibbous in its basal 

 half. Subgenital plate of ? transverse, subquadrilateral, and obtusely emarginate. 

 Similar in appearance and average size to Psychoda jyhalxnoides, Linn. 



Sab. : Ireland, England, Algeria, and Madeira. 



Threticus gemina, sp. nov. 

 A rather smaller species. $ inf. app. unitenaculatc. Basal joint of the $ app. 



