psilopus. 245 



i Middle tibiae of the % with strikingly long spurs. 13 calcaratus Lie. 



\ Middle tibiae of the % without long spurs. 14 inermis Lw. 



, - ( Antennae entirely black. 15 scintillans Lw. 



( Two first joints of the antennae yellowish. 16 



,g ( Fore femora without thorn-like bristles upon the under side. 17 



1 Fore femora with yellowish thorn-like bristles upon the underside. 20 

 ,- ( Abdomen at the basis not yellow. 10 pallens Wied. 



\ Abdomen at the basis yellow [not metallic]. 18 



, „ ( Tarsi for the most part, blai;k. 17 variegatus Lw. 



( Tarsi but little infuscated towards the tip. 1!) 



1C) ( All the coxae entirely yellow. 18 bicolor Lw. 



iddle coxae gray with yellow tip. 19 psittacinus Lw. 



(All 

 ( Mic 



All 



Middle and hind coxae blackish. 21 filipes Lw. 



2f . ( All the coxae entirely yellow. 20 tener Lw. 



(Mic 



Systematic arrangement of the Species. 

 I. Tegulae with black cilia. 



A. Wings with a dark picture. 



A. Wings black, only the tip and the hind margin hyaline. 



1. dimidiatus Lw. 



b. Wings hyaline with two fasciae connected at the anterior mar- 

 gin. 



2. sipho Say. 5. melampus Lw. 



3. scaber Lw. 6. pilosus Lw. 



4. patibulatus Say. 7. jucundus Lw. 



B. Wings without dark picture. 



a. First longitudinal vein reaching far beyond the middle of the 



wing. 



8. ciliatus Lw. 



b. First longitudinal vein reaching at the utmost but to the mid- 



dle of the wing. 



1. Arista apparently apical and remarkably elongated. 



9. comatus Lw. 



2. Arista distinctly dorsal and not remarkably elongated. 



a. In the % only the fore tibiae, in the 9 also the middle 



tibiae, yellow. 



10. cbxysoprasius Walk. 



b. In the % all tibiae, in the <? also all femora, yellow. 



11. scobinator Lw. 13. calcaratus Lw. 



12. caudatulus Lw. 14. inermis Lw, 



