DIELOCEEA.— PTILIA. 43 



testaceous. The head projects behind the eyes, which are oblong ; the first cubital 

 cellule is as long as the second on the lower side, but much shorter on the upper, owing 

 to the radial nervure issuing from the stigma. The cubital nervure is curved at the 

 base and issues from the transverse basal ; the third cubital cellule is longer than 

 second ; the cubital nervure ends a little beyond the third cubital cellule ;. the first 

 recurrent nervure is received quite close to the first transverse cubital nervure* the 

 second in the middle of the cellule opposite the horny point. There is a bulla on the 

 first transverse cubital nervure, one on the junction of the second recurrent with the 

 cnbital, on second and third transverse cubital, and on the stump of the cubital after 

 the latter ; there is a horny point in costal cellule. 



3. Dielocera filiformis. 



Ptiliafiliformis, Norton, Trans. Amer. Eht. Sbc. i. p. 62 (1867) ; Cat. p. 32, p. 2 1 ( ? ). 

 Hemidianeura scapularis, Kirby, List of Hymen, i. p. 49. no. 3, t. 3. f. 15 2 (<£'). 



Hab. Mexico, Oaxaca 2 , Cordova \ 



This is a smaller species than D. imitatrix, and differs from it otherwise in having the 

 seutellum black, the testaceous colour under the wing more extended, the four anterior 

 femora for the greater part and only the extreme apex of the hinder tibiae black, and 

 the second recurrent nervure is received quite close to the third transverse cubital. 



4. Dielocera crassa. 



Rufa, antennis, capite, pectere pedibusque nigris ; tibiis tarsisque- 4 anterioribus sordide testaceis ; alis fuscis, 



costa stigmateque nigris. 

 Lomg. 6 miUim. 



Hab. Mexico, Presidio (Forrer). 



The antennas are stout, roughly pilose, and not much longer than the thorax ; the 

 face is finely punctured, not smooth and shining like the vertex ; the mandibles are 

 piceous. There is a large bulla in the first transverse cubital nervure ; the first cubital 

 cellule is longer on the lower side than the second, which is not quite double the length 

 of the "third; the first recurrent nervure is received quite close to the first transverse 

 cubital ; the second recurrent is interstitial. The legs are stout ; the spurs not one third 

 of the length of the metatarsus, which is about the length of the three following joints ; 

 the fourth joint is as long as the two preceding. The sheath of saw is deep black and 

 pilose. 



PTILIA. 



Ptilia, St.-Fargeau, Mon. Tenthr. p. 49 (1823) ; Enc. Meth. x. p. 237 (1825). 



Didymia, St.-Farg. & Serr. Enc. Meth. x. p. 574 (1825). 



Scobina, St.-Farg. & Serv. 1. c. p. 574. 



Bylotoma, § 4, Klug, Jahrb. d. Insect, i. p. 245 (1834). 



Rusobria, Cameron, Trans. Ent. Soc. 1878, p. 150. 



GG2 



