150 doliciiopid.t;. 



Genus I. PSILOPUS. 



PsiLOPUS, Mg. zw. (1824); Mq.; Ztt. Leptojms, Mn. Sciajms, Zlr. 



Dolickojnis Y)., lA.; Fb. s. a ; Wd. z.m; Lliin. 3fusca ]).,'Fh.; Gm. 

 Atitennce articulo tertio imtelliformi, ante apicem arista dejtexu. Oculi 



glahrl. Vena p7'cebrac]iialisfurcata, ramo a^iteriore uhlique flexo prope 



cubitalem exeunte. Hypjopygiuni maris extricatum, appendicibus tenuibus. 



Very slender. Eyes apparently glabrous, separated in both sexes ; 

 tlie lower orbit fringed with soft white hairs ; the face usually broad, 

 more so in the female. Third joint oftlie antennae short and rounded, the 

 slender pubescent arista pilaced on its upper edge ; the penultimate joint 

 short, but usually extending beyond the end of the third, and forming 

 an angle Avith the last, which is drooping and often very long. (In 

 P. platyptenis the fourth joint is particularly short, and less distinct.) 

 Wings usually broad, with the anjil angle rounded away : the prabra- 

 cldal vein in its last or subapical tract forked, the posterior brancli 

 running on straight, but becoming faint, and usually vanishing before 

 the margin, the anterior hrancli distinct (in P. platypterns faint), in- 

 clined forwards, with a strong flexure, and reaching the margin close to, 

 without however meeting, the cubital vein. The alulpe have a narrow 

 denticulated black edge and a radiating fringe of hairs. The aljdomen 

 of the males is very long and slender, nearly cylindrical, and a little 

 arched, showing six segments above ; the hypopygitim disengaged from 

 the ventral cavity, broad, compressed, with a number of slender ap- 

 pendages of various form and length. In the female the spines of the 

 vagina are longer than usual. The legs are very long and slender, the 

 spines of the tibife few and slight. In the females of aU, the fore coxse, 

 and the lower edge of the fore femora in their first half, are pectinated 

 with a few long pale spines ; which are slighter in the males, if found 

 at aU in this sex. 



The warmer climates of both hemispheres abound in the species 

 of this genus ; some of them, with variegated wings, among the 

 handsomest of the family. The few species that occur in the 

 British islands have the wings spotless, the first two joints of the 

 antennas and the greatest part of the legs pale yellowish. They 

 may be distributed as follows : — 



a. First joint of hind tarsi twice as long as the second. Species 1. 

 a a. First joint of hind tarsi little longer than the second. 

 b. Abdomen with narrow indistinct bands only. 



c. Fore tarsi with peculiar marks in the male. Species 3, 3. 

 c c. Fore tarsi alike in both sexes. Species 4, 5. 

 b b. Abdomen with broad dark bands. Species 6. 



■1. platypterus, Fb. s. a. 270. 20(1805); Mg. ; Mq. ; Zh-. ; St. 

 ill. h. pi. 45. f. 4 ! — tipidarius. Fin. ; Ztt. Pallide eeneo-viridis, eapite 

 albido, jjedibus pallidis, metatarsis omnibus elongatis ; Mas. alis divari- 

 catis, femoribus anticis sub apice crinitis, tarsis intermediis ante apicem 

 atrunt albis. Long. 2-3; alar. 5 lin. 



