148 Orthonhapha brachycera. 



grey; the hairs on vertex and frons black, those on the cheeks pale 

 yellow, all the hairs shorter than in the male; no black hairs on the 

 jowls. Frontal callus transverse, reaching from one eye to the other; 

 it is excised below in the middle but straight above, thus almost 

 forming a transverse stripe, sometimes nearly divided in the middle. 

 Thorax greyish brown, the two longitudinal lines generally distinct; 

 the erect, black and the quite depressed, yellow hairs are short. 

 Abdomen black with yellowish grey, transverse bands at the hind 

 margins of the segments; the bands are somewhat broad towards the 

 sides, especially on the first segment; the seventh segment shining 

 black. The first four segments are clothed with short, depressed 

 hairs which are black on the black parts, yellow on the transverse 

 bands; they are somewhat longish at the hind margin of the first 

 segment; the last segments have short, erect, black hairs; on the 

 fourth segment there are both depressed and erect hairs. Venter 

 sparingly clothed with long, pale hairs on the first three segments, 

 and with short, erect, black hairs on the last four segments. The 

 hairs on the femora shorter than in the male. 



Length 10—12,5 mm. 



The fuU grown larva has a length of 33 mm., the pupa of 14 

 — 16 mm. 



Remarks: In this species I have not rarely found the fourth 

 posterior cell somewhat open in the female. 



This species is similar to tiobilitata, especially to the darker forms 

 of this species, but it is in the male distinguished by the darker hairs 

 and by the brownish colouring on the hind parts of the abdominal 

 segments being indefinite and thus no distinct, dark, triangular or 

 rounded spots being formed; in the female it is distinguished by the 

 narrow, transverse frontal callus. From piebeja it is distinguished in 

 the male by not having grey bands on the abdomen and by the hind 

 margins of the abdominal segments being dceply yellow. 



T. circumscripta is rare in Denmark; only nine specimens have been 

 caught; Ordrup Mose, Bøllemosen (the author), at Slagelse (Th. Morten- 

 sen) and at Nyraad (J. G. Nielsen) ; in Jutland at Restrup near Aalborg 

 (the author) and at Sæby (H. J. Hansen). My dates are Ve — ^^/s. The 

 larva was found in Bøllemosen in mole-casts on '"Ig, they pupated soon 

 after and the imagos came on ^'•'-^'^/c, ; the pupa was found in Dyrehaven, 

 likewise in a mole cast, on ^Ve, it developed on ^V«, and finally a pupa 

 was found at Ghristianssæde on Lolland in a decaying oak on -Vg. 



Geographical distribution: — Europe down to southern France; 

 its northern limit seems to be in Denmark, 



