AMALOPIS. 515 



This genus is allied to Pedicia, Latr., Dicranota, Zett., EJiapJd- 

 dolabis, Os. Sac., Ple-ctromyia, Os. Sac., and Ula, Hal. 



A correspondence carried on between Osten Sacken (Berl. Ent, 

 Zeits. xxxi and xlii) and Bergroth (Wien. Ent. Zeit. vii and 

 xvii) as to the question of priority and suitability between 

 Amalopis, Hal., and Tricyphona, Zett., resulted in the former- 

 name being permanently retained.* Osten Sacken pointed out 

 that " the almost absolute rules of priority recognised for specific 

 names are not equally applicable to the generic ones. Zetterstedt's 

 definition of Trieyphona is not applicable to Amalopis, as it is 

 principally based upon the absence of the discal cell, a character 

 of mere casual importance." Haliday, in 1856 (in Walker's 

 Insecta Britannica, Diptera, vol. iii), noted the pubescent eyes, 

 the frontal tubercle and the absence of the discal cell, to which 

 Osten Sacken added (Proc. Acad. Nat. Sci. Philad. 1859) the 

 position of the subcostal cross-veiu, and upon these characters 

 founded his group AMALOPINA. 



Variation in the venation in this genus appears to be common ; 

 the discal cell being very inconstant in the same species, whilst in 

 some European and North American species t the second basal 

 cell is divided by a supernumerary cross-vein. 



Table of Species. 



Wing wholly clear ; discal cell closed r/labripennis, sp. n. 



Wing with cross-veins and tips of longitudinal 



veins a little iufuscated elegans, sp. n. 



368. Amalopis glabripennis, sp. nov. (PL X, fig. 12.) 



J . Head : eyes contiguous below ; frons very broad, mode- 

 rately dark grey, as are also the neck and the back of the head. 

 Antennae dark brown, rather pubescent ; palpi dark brown. 

 Thorax grey, with three dorsal stripes ; the median one broad, 

 attaining the anterior margin ; the outer ones short, pointed m 

 front, and (except for the narrow pale suture) joined to the 

 single postsutural oval spot on each side ; sides of thorax 

 yellowish, with some grey on the underside. Scutellum and 

 metanotum yellowish grey ; the former a little brownish on 

 dorsum. Abdomen dark brown, blackish towards tip, with pale 

 pubescence at the sides ; belly yellowish on basal two-thirds. 

 Genitalia blackish, consisting mainly of a pair of rather large 

 black pointed claspers, with dark brown hairs, also a small 



* See also Osten Sacken's notes (Eerl. Ent, Zeits. xxxi, p. 224) on the 

 synonymy of this genus, with special reference to Trieyphona, Zett, Bophrosia, 

 Kond., and Nastier na, Wallg. 



t A varinervis, Zett., and A. hyperborea, Os. Sac., respectively. 



2L 



