244 NOTES. 



197. Chrysotoxum. About the european species, see Loew, Verb. 

 Zool. Bot. Ver., 1856. Besides the enumerated species of Ghryxotoocwm, 

 the following european species are quoted as occurring in North America: 

 bicinctum Meigen , by Mr. Loew in Neue Dipterol. Beitr. IV, p. 18, 

 together with HelopTiilus pendulus, versicolor and floreus, also european 

 species. The statement about Chr. bicinctum is repeated by Loew, 

 Verb.. Zool. Bot. Ver. 1856, p. 614. None of these species has ever been 

 found in N. A. since, and the statement seems to be based on an error 

 of locality. The specimen of Clir. bicinctum on which the statement was 

 based, is among the collection of Dr. Loew's North American types 

 C. fasciolatum Deg., according to Walker, List, etc. Ill, p 541, was 

 found in Huds. B. Terr. I would not trust this statement without com- 

 paring the specimens. 



198. Paragus aeneus. ,,The name aeneus was given by Walker in 

 1849 when there existed an aeneus Meigen (.1822), now considered a 

 synonym of tibialis Fallen". (Verall in litt.). 



199. Chrysogaster. About the european species, compare Loew, 

 Stett. Ent. Z. l43, p. 204. sqq; also Wiener Entom. Monatsschr. I, 

 p. 4. In the former article the author also gives his opinion on the 

 nomenclature of the genera of Syrphidae, and on the confusion prevailing 

 in it owing to the arbitrary changes, introduced by Fabricius, Fallen 

 and Zetterstedt (Eristnlis Latr. Syrplms Zett.; Syrphus Meig. = Scaeva 

 Zett; Eristalis Zett. = Chilosia Meig.\ 



200. Chilosia. On the european species, compare Loew, Verb. 

 Zool. Bot. Ver. 1857. 



201. Syrphus Naso and Pacilus are Platycairi; whether they differ 

 from P. pcltittns and quadratic, 1 am unable to tell, as I had no spe- 

 cimens for comparison when I saw the types in the Brit. Mus. 



202. Leucczona. There is a genus Leucoronia Mollusca, 1847, 

 which however does not interfere with the other. 



?03. Catabomba. ,,The eyes of the male have an area of large 

 facets in the upper and middle portion (a structure wh ch I have not 

 observed in any SyiyJiit?, sensu stricto); the hypopygium of the male is 

 much smaller than in Syrphus, entirely concealed under the fifth seg- 

 ment; the front is remarkably convex in both sexes" (Osten Sacken, 

 Western Diptera). The name is derived from xnTitpuiipfai, ,,I am humm- 

 ing round." The european SyrpJtus seleniticus also belongs to Cata- 

 bomba; Syrplius melanostoma Macq. Dipt. Exot. II, 2, p. 87, from Chile, 

 likewise. 



204. Syrphus. Compare my paper: On the N. A. species of the 

 genus SyrpJtits, in the Proc Bost Soc. Nat. Hist., 1875. 



205 Syrphus Alcidice Walker, List, etc. Ill, p. 579 (Huds. B. TenO 

 is repiesented in the Bjrit. Mus. by three specimens, one of which belongs 

 to the group of S. lapponicus ; the two others have faint yellow spots 

 on the second segment only, the remaining abdominal segments being 

 dark metallic green, with an opaque black longitudinal line in the 

 middle. It is either a species which I do not know, or a dark variety 

 of some well-known one. The description refers to these latter speci 



