Contributions to tlie Study of the Liponeuridae Lw. 167 



line which separates the larger, hexagonal facets from the smaller 

 ones (fig. 15, 1), begins near the Insertion of the antennae". I have 

 examined the eyes of living specimens of the holoipüc Bleph. capi- 

 tata in both sexes, and have found that the only sexual difference 

 in the structure of their eyes consists in the relative size of the two 

 halves separated by the bisection; the upper half is smaller in tho 

 male than in the female (0, S. 1878, p. 405). 



To conclude: none of Dr. F. M.'s forms belong to the genus 

 FalL; the bloodsucking 5 (Dr. F. M.'s fig. 14, head; fig. 9 last 

 Joint of tarsi; fig. 21, mouthparts) is, very probably, a Snowia; 

 the holoptic (/ (fig. 7, whole fly; fig. 15, head; fig. 10, lastj. of tarsi; 

 fig. 20, 22 mouthparts; fig. 24 forceps) must belong to some new 

 genus, which should better retain the name Curupira torrentium 

 F. Müll.; the flowersucking Q (fig. 13, head; fig. 8, last j. of tarsi) 

 is still doubtful; if it proves to be a dimorphic Q form oi Snowia, 

 it will add a new and interesting fact to the history of the family. 



The name Paltostoma has been erroneously introduced in this 

 connection by Brauer, who misnamed the genus, in spite of the 

 evidence he had before him, as Dr. F. M. had sent him a photograph 

 of Ins plate VII, in advance of its publication. Comp, the Statement 

 of Dr. F. M. about it in the Ent. M. Mag. XVII, p. 226. 



As far as I am acquainted with Snowia from the description, 

 the genus seems to be closely allied to Paltostoma, except that it 

 has a Short proboscis and fully developed palpi. The presence of a 

 crossvein between the fourth and fifth veins, as pointed out by 

 Willis ton, may also constitute a ditt'erence; nevertheless our ex- 

 perience with JLiponeura proves that this character may not be of 

 generic importance (comp, this last genus in the Analytical table in 

 § 4 of this paper ; two species of Lipon, mentioned in it, are provided 

 with that same crossvein, and two others not). Schiner's figure of 

 the wings of Paltostoma shows no crossvein; neither does that of 

 the wing of Curupira cf (fig. 7) of Dr. M. — The coloring oi Sno- 

 luia, according to Williston (yellow and black), resembles that of 

 the S. American and Mexican Paltostomae described l)y Schiner 

 and Seen by me. 



A parallelism worthy of notice, occurs between two couples of 

 genera: on one side the holoptic Blepharocera and the dichoptic 

 Liponea7ri, both belonging to the first group of Liponeuridae, 

 being provided with the incomplete vein; on the other side the holop- 

 tic Ctirupira and the dichoptic Snowia, both belonging to the second 

 group of the family, in which the incomplete vein is wanting. Now 

 both of thesc couples were discovered under somewhat similar 



