2 GO DIPTERA OF NORTH AMERICA. [PART IV 



its inner end in one line with the inner end of the last posterior 

 cell ; a form of venation which is not altogether foreign to the 

 Amalopina also (compare A. vernalis O. S., opaca Meig., etc.). 



This last character, the peculiar shape of the penultimate 

 posterior cell, is only wanting in the genus Ula, which, with its 

 17-jointed antennae and its pubescent wings, seems to form a 

 group for itself, without any particular affinity to the other two ; 

 its position among the Amalopina, however, is abundantly vindi- 

 cated by its other characters. 



The separation of the Amalopina from the genus Limnohia in 

 the sense of Meigen is of too recent date yet, as that we should 

 know much about its relative position with regard to the other 

 sections of the Tipulidse. The pubescence of the eyes seems to 

 be peculiar to the Amalopina, and has not been observed in any 

 other Tipulidse, except in Trichocera. And it is singular enough 

 that in all the species hitherto observed this character should be 

 accompanied by another, equally peculiar to this group, the posi- 

 tion of the subcostal cross-vein, anterior to the origin of the 

 second longitudinal vein and so far removed from the tip of the 

 auxiliary vein. The coincidence of such characters, together 

 with the structure of the male forceps (differing from the types 

 prevailing in the other sections) constitute a compact and well 

 characterized group. 



About the occurrence of Amalopina in the other parts of the 

 world, besides Europe and North America, almost nothing is 

 known. The venation of Polijmera fusca, from Brazil, figured 

 in Wiedemann's Auss. Zw. Vol. I, Tab. YI, fig. h, 4, strongly 

 reminds of Rhaphidolabis ; the tibias of this genus have spurs at 

 the tip ; the antennae are 28-jointed, pubescent (sometimes, how- 

 ever, 14-jointed ? comp. Wied. 1. c. p. 554). I have never seen this 

 genus; the descriptions of Wiedemann and Macquart {Dipt. Exot. 

 I, 1, p. 64, Tab. 8) are not sufficient to determine its position with 

 certainty (that of Wiedemann is translated in the Appendix II). 



Gen. XXXV. AMALOPIS. 



Two submarginal cells ; five posterior cells ; discal cell generally present, 

 sometimes wanting ; the subcostal cross-vein is more or less anterior 

 to the origin of the second longitudinal vein ; the second submarginal 

 cell is never longer (usually distinctly shorter) than the first posterior 

 cell ; the tip of the wing is rounded in both sexes (not sinuate posteriorly 



