242 NOTES. 



183. On the european species of Hemerodromia, see Loew, Wien. 

 Ent. Mon. 1864, p. 237. 



184. An observation of the lamented B. D. Walsh may he worth 

 recording here: ,,It may perhaps be worth while to add, that on the 

 grape-vine where these JKrythroiieurac where swarming. I noticed a small 

 and rather rare dipterous fly, the Hemerodromia sitperstitiosa of Say, 

 very busily engaged. I caught him and put him in my collecting bottle, 

 along with a number of leaf hoppers, and shortly afterwards saw him 

 approach one slily, stick his beak into it, and suck it to death, 

 without using previously his long raptorial front legs." (B. D. Walsh, 

 Fire Blight, in the Prairie Farmer, Chicago Illin. 1.^62 ) 



185. On the european species of Clinoccra, see Loew, Wien. Ent. 

 Mon. 1858, p. 238. 



186. Compare H. Loew: On the N. A. Dolichopodidae, in the 

 Monographs of N. A. Diptera, Vol. II (1864), a monographic work on 

 the north american genera find species of the family. 



The same author's earlier publication: Di$ nordamericanischen Doli- 

 cliopodiflen (in the Neue Beitriige, VIII, 1861) is superseded by the later 

 one in English. 



The classification of the family is chiefly due to Mr. Haliday 

 (principally in Walker's Insecta Britannica, Diptera) and to Dr. Loew, 

 in the Neue Beitrage, V, 1857 (Die Familie der Dolichopoden). 



In a recent paper, Dipterologische Qntersuchungen (Vienna 1878), 

 Mr. Joseph Mik, describes twelve new genera, all european, and several 

 new species of Dolichopodidae. 



187. Orthochile derempta Walker, List, etc. Ill, p. 667, also in 

 Monogr. II, p. 318, North America, is discussed by Mr. Loew, in 

 Monogr. II, p. 115. It is certainly not an Oiihocltile, but from Mr. 

 Walker's imperfect statements it is impossible to tell, where it belongs. 

 The typical specimen, which I saw in London, looked very much like 

 a Chrysotus. 



188. About the definition of the genera Hypopliyllus, Hercostomus 

 and Gymnopternus, compare Loew, Beschr. Europ. Dipt. I, p. 278. 



189. Porphyrops signifer, n sp. $. Tip of the arista expanded into 

 a small lamel; body metallic green; feet yellow, except the hind tibiae 

 and tarsi, which are black. Length, about 5 mm. 



Bright metallic green; abdomen more golden green ; the narrow face 

 silvery; front green, with a white bloom; posterior orbits, below, with 

 long white hair. Third antennal joint long and tapering, arista of nearly 

 the same length as the joint, expanded at the tip into a small lamel. 

 Feet yellowish, except the base of the coxae, which is blackish-gray; 

 the end of the front tarsi brownish; upper part of the hind femora in- 

 fuscated; hind tibiae and tarsi black. The front coxae, as well as the 

 front and middle femora, are beset with long and delicate white hairs; 

 there are remarkable small tufts of short hairs near the tip of each of 

 the middle coxae. Halteres pale yellow; tegulae with yellowish cilia. 

 Wings distinctly infuscated, more hyaline near the root. 



