264 DIPTERA OF NORTH AMERICA. [PART IV. 



pean A. varinervis Zett. The stigma is elongated and but little 

 denned. 



The abdomen of the male is elongated, often attenuated at the 

 basis, and more or less club-shaped at the tip. The forceps of A. 

 inconstans (Tab. IV, fig. 30) consists of a pair of coriaceous 

 basal pieces, hollow inside (cc) ; each of these has a large horny 

 appendage, with two branches directed upwards {ad), and a soft 

 fleshy and pubescent lobe (b) ; moreover, there is a pair of smaller 

 horny appendages (h) inside of the forceps (compare also the de- 

 tails given in explanation of the plate). The forceps of the other 

 species seems to be formed pretty much on the same plan. The 

 ovipositor of the female has moderately long and broad, some- 

 what arcuated and pointed upper valves. 



The species of Amalopis are of medium size, some of them 

 comparatively large ; they occur in damp situations ; nothing is 

 known about the habits of their larvas, which are probably aquatic, 

 like those of Pedicia. Amalopis is very closely allied to the latter 

 genus, and it is rather difficult to find a satisfactory character to 

 distinguish them. From Dicranota, Rhaphidolabis, and Plec- 

 tromyia, the present genus, as well as Pedicia, are distinguished 

 by the number of antennal joints, by the circumstance that, on 

 account of the peculiar position of the small cross-vein, already 

 explained, the second submarginal cell is never longer than the 

 first posterior, and by the frequent occurrence of the form of vena- 

 tion in which the first submarginal cell is longer than the second 

 (compare also the general remarks on the Amalopina, p. 259). 



I possess five North American species of Amalopis, and Dr. 

 Schiner enumerates nine European ones, some of which, however, 

 are probably synonymous. . I have every reason to believe that 

 Limnobia varinervis Zett., from Norway, which I know only 

 from the description (Zett. Dipt. Scand. X, p. 3813), is an Ama- 

 lopis. Limnobia congrua Walker, List, etc. I, p. 42, from Swan 

 River, is an Amalopis ; I have seen it in the British Museum. 



The genus Amalopis (from dfia%b?, soft, and 8%, face) was first 

 proposed by Mr. Haliday for Limnobia occulta M., in Walker's 

 Ins. Brit. Diptera, Vol. Ill, 1856. It was not incorporated into 

 the work, however, but introduced in a note among the Addenda 

 and Corrigenda (1. c. p. xv), after the work had been completed. 

 Mr. Haliday points out the hairy eyes, the frontal tubercle, and 



