114 Phoridae. 



and from Planorhis corneus, scraped up and lying at the border of a | 

 streamlet, taken by Dr. Mortensen in Hillerød on ^V?, the imagines ! 

 were then emerging and continiied so in the following time; I kept ' 

 the snails after emerging had stopped, and on ^Vi2 to ^U next year 

 some imagines again appeared, the room was heated and in the free ! 

 these imagines would evidently have come in spring; according to the j 

 above, the species has at least two broods in the year with iis; Schmitz i 

 States (Biol. Zentralbl. 37, 1917) that in Holland the nearly related 

 domestica {hergenstammi by Schmitz) has several broods in the year. 



Geographical distribution: — Europe down into Egypt (Becker), 

 it is not known north of Denmark; it occurs also in North America. | 



Remarks: This species is very similar to and related to P. dome- i 

 stica Wood which species does not occur in Denmark; the two species I 

 are, however, easily di^tinguished, as domestica has in the male only i 

 two dorsocentral bristles and ordinary bristles on the palpi, and in 

 both sexes the costa does not reach quite to the middle, 1 is more j 

 than double 2, and the fourth vein is less curved at base; also is i 

 domestica often paler and has pale hind margins to the abdominal j 

 segments. The two species have been confused since Malloch in 1910 

 united them; in my paper, cited in the synonymical list, I have made j 

 out their distinctions and synonymy and to this I refer. 



4. P. immaculata Strobl. i 



1894. Strobl, Mittheil. Nat. Ver. Steierm. XXX, 14 {Phom thomcica \ 



var. immaculata). — 1910. Strobl, ibid. XLVI, 119 {Phora). — 1914. Brues, | 



Bull. Wisc. Nat. Hist. Soc. XII, 90. - 1917. Schmitz, Biol. Zentralbl. 37, 36 i 



et 1918. Jaarb. Natuurh. Genootsch. Limbiu-g 1917, 93. — Phora dorsalis I 

 Beck. 1901. Abhandl. zool. bot. Geseli. Wien, I, 31, 19, Taf. II, Fig. 23. - 1906. 



Wood, Ent. Month. Mag. 2, XVII, 262, 265. — 1910. Kertész, Cat. Dipt. VII, j 

 391. — 1910. Malloch, Ann. Scot. Nat. Hist. 20 {Spiniphora). 



Male. Frons low, considerably broader than high, blackish grey," 

 dull; bristles strong, the two anterior rows very convex. Antennæ i 

 orange, third joint elongated and enlarged; arista short-pubescent. 

 Palpi yellow, of ordinary size, the bristles not long. Thorax yellow, { 

 dull, with short, black pubescence and two pairs of dorsocentral 

 bristles. Scutellum with four about equal bristles. Pleura yellow. 

 Mesopleura bare. Abdomen with second and sixth segments elongated; 

 it is dull yellow, the front part of the segments more or less indeter- 

 minately blackish, the most broadly on second and sixth segments, 

 on the middle segments generally to a slight degree and interrupted '■ 



