Penium. 65 



vein either bent about as in P. Heringi or of a course about as in 

 Pipiza, the upper angle thus more or less acute ; the mediastinal vein 

 ending after the medial cross-vein. 



I have here accepted the genus Penium, foUovving the Kat. palåarkt. 

 Dipt., but I must say, that I do not understand that Kowarz (Wien. 

 ent. Zeitg. IV, 1885, Ml) has thought to be able to interpret Philippi's 

 genus (Verhandl. zool. bot. Geseli. Wien, XV, 1865, 741, Tab. XXVII, 

 Fig. 38 and 41): the description and figmes are not at all sufficient, 

 and the figures of the heads (38 a, 41 a) do not show the arched frons 

 found in P. carbonarium. Provisionally then the P. carbonarium Meig. 

 apud Kowarz may be taken as type. Through the kindness of Mr. 

 Collin in Newmarket I have been able to study Kowarz's types. When 

 I have after all accepted the genus it is because there seems to be 

 some species which do not agree with the other genera in the Pipiza- 

 group. Of these genera Pipiza has a conically protruding frons which 

 is small and flat in the male (figs. 23 and 24) ; the other genera have 

 the frons not conically protruding and in the male rather large and 

 arched (figs. 19 and 20). Of these latter Pipizella has elongated 

 antennæ and the upper angle at the upper marginal cross-vein about 

 rectangular (except Heringi); Cnemodon has spurs on coxæ and 

 trochanters in the male, a transverse depression on the frons in the 

 female, the upper angle at the marginal cross-vein acute and short 

 antennæ; also the abdomen in the female is somewhat pointed. Now 

 there exist some species with unarmed legs, more or less short antennæ, 

 no depression on the frons in the female and the upper angle at the 

 marginal cross-vein not rectangular; to these belongs carbonarium, 

 and for these species I accept the genus Penium. Besides carbonarium 

 the genus includes a new species, dubium, and morionellum Zett. This 

 latter species has hitherto been placed in Cnemodon^ but this is in- 

 correct as the male has no spurs and in the whole simple legs. We 

 find in Zetterstedt (VIII, 3184) the following note: "Observante ocula- 

 tissimo Stæger coxæ posteriores marium in speciebus 14, 15, 16 et 18 

 apice spina brevi sunt armatæ." The four species are anthracina, 

 morioneUa, fulvimana and leucogona ; but for morionella and leucogona 

 Zetterstedt states that he could find no spurs. This is also correct; 

 leucogona no doubt is the male to Pipizella Heringi, and morionella 

 may be placed in Penium. Stæger (according to the note the first 

 detector of the spurs in Cnemodon) has certainly committed some 

 error and not separated the species in question correctly. 



The genus Penium is thus distinguished from Pipiza by the not 

 conically protruding frons, which is rather large and arched in the 

 male ; from Pipizella by the shorter antennæ and not rectangular upper 



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