330 DIPTERA OF NORTH AMERICA. [PART IV. 



APPENDIX II. 



ON THE GENERA OF TIPULID^ BREVIPALPI NOT INDIGENOUS IN EUROPE OR 

 IN THE UNITED STATES. 



PERIPHEROPTERA' Schiner. 



(Section LIMNOBINA; compare above, p. 53.) 



The following is translated from Dr. Scliiuer's article in the 

 Verhandl. Zool. Bot. Gesellsch. in Wien, 1866, p. 933 :— 



" Head attached rather low, short-necked, seen from above almost tri- 

 angular ; occiput strongly developed; eyes round, large, separated by the 

 broad front ; ocelli wanting ; palpi four-jointed, the last joint shorter than 

 the preceding; antennse short, 14-jointed ; first joint cylindrical, the 

 second short and stout, the joints of the flagellum rounded, rather closely 

 applied to each other, gradually diminishing in size ; the last joint bud- 

 shaped ; all joints with delicate bristles near the basis. Thorax very 

 convex ; transverse suture deep ; scutellum narrow, metathorax well de- 

 veloped ; halteres large, with a big knob. Abdomen comparatively short, 

 seven-jointed ; genitals of the male in the shape of a forceps ; the strong 

 appendages are excised on the inside, pointed at the tip ; ovipositor of the 

 female horny, almost as long as the three last joints taken together. Feet 

 very long and slender, tibije without spurs, the unpues dentate on the 

 iinder side, empodia rudimentary. Wings clavate in their outline, the 

 alulae almost wanting ; auxiliary vein long, connected about the middle 

 of the wing by a cross-vein with the first longitudinal vein ; the latter 

 vein is incurved at the tip in the second vein, and connected bj a cross- 

 vein with the costa ; the origin of the second vein is much beyond the 

 middle of the wing ; this vein is not forked ; third longitudinal vein 

 simple, strongly arcuated at the basis ; the fourth vein is emitted by the 

 fifth unusually far from the root of the wing ; the discal cell emits three 

 simple veins ; the fourth vein is in a line with its posterior branch ; fifth, 

 sixth, and seventh veins nearly straight. 



Type of the genus : P. nitens, n. sp. ; Columbia, South America." 



' From wsfi^tfhi, rounded, and wte^ov, wing. 



