56 



[ March, 



pair of superior appendasjes (hereafter abbrevi;if.cil to sun. app.) and tlie introinitteiit. 

 parts. Its liomologiie in the ? is ternnKl tlio subgenital plate. In botii series of 

 genera in the present Sub-Family the sup. app. <? greatly exceed the inf. app. in 

 strength and dimensions. The edge of the basis has been mistaken by several en- 

 tomologists for a basal joint of the inf. app. viewed sideways ; but a 2-iointed 

 condition of the inf. app. is unknown in Psychodidx. 



(J app. sup. in Phlebotomus composed of a stout basal joint and an elongate 

 terminal joint armed with either spinules or with strong curved retentive bristles. 

 Inf. app. longer tlian the basis, slender and submembraneous in texture, with 

 long, curved, stiff hairs or a single spine at their tips. External genitalia of ? 

 inconspicuous. 



2nd Series, STCORAX and TRICHOMYIA, Halidat.— Antennae 15- 

 jointed, with short 2-jointed scape ; the 1st joint in the flagellum cylindrical or 

 filiform, much the longest ; the other joints, or some of them, subpastiniform and 

 of moderate length. Proboscis not prolonged ; palpi short and rather stout with 

 the terminal joint firm. Alula as in the other series; anterior basal cell suddenly 

 contracted by a deep almost right-angled sinus opposite the cubito-anal cross-vein. 

 Radial sectors reduced to a single forked vein met by the cross-vein closing the basal 

 cell and producing by its flexura the sudden widening of the cell before the sinus ; 

 both basal cells sphenoid basewards ; 3rd anal vain in Sycorax short as in Nemo- 

 palpus, but in Trichomyia long. Basal joint in $ app. sup. relatively very stout ; 

 2nd joint shorter and smaller, in Sycorax tapering to a point with a slender ter- 

 minal spine. But in Trichomyia (viewed from above) this joint appears to be 

 Bubquadrangular (being longer than broad and somewhat squarely truncate), 

 cloven diametrically from its outer apical ar.gle to its inner base, gaping along the 

 fissure and excavated ; upper lip of the aperture oblique, straight, everted and 

 thickened, so as to present the appearance of a strong, straight, acute spine ex- 

 tending from the inner base to the obtuse diametrically opposite angle of the 

 quadrangle ; lower border of the aperture at first thin and subcrenulate, then 

 stronger and decurved to form with the outer border an acute decurved point. The 

 genitalia, viewed from the side, are shown in Ent. Mo. Mag., ser. 2, vol. iv, p. 34, 

 figs. 2a!, 2b, where fig. 36 ought to have been numbered fig. 4, and attributed to 

 Psychoda humeralls instead of to Sycorax. G-enital basis of S short ; inf. app. 

 also short, rounded compressed or lamellar, inconspicuous. Sycorax, ? , has minute 

 rounded prominences, hardly distinguishable, in place of the ovipositor and subgenital 

 plate ; the valves in Trichomyia are short, broad, suboval laminae, and the plate 

 minute, subtriangular and subobtuse. 



The genera Psychoda, Pericoma and JJlomyia, auctorum, may now be taken 

 together into consideration. In all of tliem the palpi are 4-jointed {pace Curtis 

 and Schiner), and the radial sector 3-branclied (usually constituting a forked vein 

 and a simple vein) ; median vein single ; cubitus forked ; three anal veins. Maxi- 

 mum number of joints in the antennae 16, sometimes reduced in (?, of which two 

 form the scape ; the fades or general aspect of joints in or about the middle of the 

 flagellum, and the form of the 1st, 3rd and apical joints of the whole antennae in 

 this sex are of chief importance. To avoid needless repetition, I pass unnoticed 

 the greater bulk of the chai'acteristics noted in my Synopsis of British Psychodidse 



