160 C. R. Osten Sacken: 



of the course of the seventh vein, as well as of tlie veins, siirroimding 

 the Stigma; the figure by Mr. Van der Wulp, Tijdscli. etc. XXVIII, 

 Tab. 4, f. 5 is better). 



The antennae, in the male, where tliey are long, count, accor- 

 ding to Wiedemann ten joints. I do not remember having attempted 

 to verify this Statement; nor do I find, among my notes any notice 

 on the number of joints of the only female asiatic Megistocera which 

 I have Seen. The american Megistocerae with short antennae in 

 both sexes count only eight joints. 



The rostrum shows a distinct nasus; the last palpal Joint is 

 rather long; the legs are exceedingly slender; the ends of the tarsi 

 are almost hairlike and to the naked eye, do not differ from the ends 

 of the antennae; imder the microscope the last Joint of the tarsi, in 

 the male appears linear, without excision on the underside; the un- 

 gues are exceedingly minute. 



Forceps of the male small; horny appendages simple, opening 

 like the blades of a penknife. 



Ovipositor with a largely developed basal piece and minute 

 valves at the tip ; lower valves very much withdrawn under the basal 

 piece. 



About the species from Brazil, which I refer to Megistocera 

 I find in my papers the following notice: 



Antennae in both sexes of nearly equal length, very short, 

 almost shorter than head and rostrum taken together; 8-jointed; 

 there may be perhaps a 9th, rudimentary Joint at the tip, which 

 may be indistinct in the dry specimens; scapus of ordinary structure; 

 joints 3 — 8 (g) cylindrical, without verticils; 3 and 4 elongated, not 

 differing much in length; the following ones gradually decreasing in 

 length; two long hairs at the tip. 



Rostrum of a moderate length, with a distinct nasus; last Joint 

 of palpi about twice as long as the preceding ones. 



Wings longer than the body, crystalline; venation of Megisto- 

 cera, except that the discal cell is a little larger ; the peculiar thicke- 

 •ning at the bifurcatiou of the fifth vein, exists here, as in Me- 

 gistocera. 



Legs very long; I perceive only a Single long, sleiider spur on 

 the bind tibiae; the front and middle tibiae seem to be spurless. 



Ovipositor like that of Megistocera, its basal portion very 

 much developed; the lower valves broad and curved, so as to leave 

 a Space between them and the upper side; upper valves very small, 

 curved. 



