Contributions to tlie Study of tlie Liponeuridae liW. 157 



Wiiigs. 



An incomplete vein on the bind margin. 



Second vein consisting of two branclies: Bihioc, Äpathon. 

 Second vein simple, witbout brancb. 

 A crossvein betvv. tbe veins 4 and 5. 

 Submarginal cell sessile: Lip. hiloh. 



Subm. c. w'ith a long petiole: Lip. yosem., Bleph. (xnc.illa. 

 No crossvein betw. the veins 4 and 5: Bleph.., Lip. ein., Lip. brev. 



No incomplete vein on the bind margin. 



A longitudinal vein betvv. veins 1 and 4. 



A Short submarginal cell (Palt., Snowia, Curvpira, fJapal.). 



No submarginal cell (Apist.). 

 No longitudinal vein betvv. veins 1 and 4 (Hammai.). 



NB. The auxiliary vein is distinctly visible in Bibioc. Agathon 

 and Lip.yos.; in Lip. ein. only a beginning of it. Other data are 

 wanting. 



In my paper 1878, p. 411 I have stated, upon coraparison of the original 

 specimen in Bigot's collection, that the second vein, shaped somewliat like 

 an S, is incorrectly represented in the figure (Ann. etc. 1862, Tab. 1, f. 1) 

 as ending in the first vein; its tip runs for a short distance closely along- 

 side of the first vein and ends in the costa. Loew's figure of the same 

 wing (1877, I, f. la) is nothing but a copy from Bigot, and reproduces 

 this error. About Verrall's communication on this subject, comp, helow, 

 p. 169. I called this vein second longitudinal. Loew (1877, p. 73) 

 gives it a diiferent Interpretation. For want of specimens I cannot dccide 

 this question. 



C. General remarks. 

 Genera. 



Blepharocera, with two closely allied sp. (in Eur. and N.Am.); 

 a third Bl. ancilla (Cal.) differs in the venation, and bas a bisecting 

 groove, instead of an unfacetted stripe across the eyes. 



Liponeura with four sp. sbowing considerable diiferences especi- 

 ally in the venation. 



Paltostoma with one sp. from Colombia (S.Am.); specimens from 

 Mexico and the West Indies, seem to belong to a diiferent species. 



The remaining genera are known but in a Single species. 

 Sexes. 



Both sexes are known of Bleph. fase. and cap., Lip. ein. and 

 brevir. and Apist 



