84 Orthorrhaplia brachycera. 



with spiracles on the prothoracic and last abdominal segments. The 

 length is about 40 mm. 



The pupa is free, yellowish brown, the head with two spines in 

 front ; on the ventral side of the thorax there are five, pentagonaiiy 

 arranged, spines: the abdominal segments have, at the hind margins, 

 a girdle of flat spines of unequal length; there is a pair of prothoracic, 

 and seven pairs of abdominal spiracles: the apical segment bears 

 spines. The length is about 30 mm. 



The larva has been found in decaying wood of poplars, and in the 

 earth, at the roots of trees, especially in forests of beeches, and pupæ 

 iiave been found in the same piaces. The larvæ are carnivorous and 

 rapacious as the Xylophagus larvæ. Beling suggests that the total 

 development may last more than one year. 



The species of Coenonu/ici occurs in woods and it is recorded to 

 be rather slow and sluggish. 



The genus only includes one palæarctic species, also occurring in 

 Denmark. 



1. C. ferruginea. 



1763. Musca, Scop. Ent. Garii. 340, 913. — 1842. Sicus, Zett. Dipt. 

 Scand. I, 130. 1. — 1862. Schin. F. A. 1, 28. — 1903. Kat. palaarkl. 

 Dipt. II. 44. 



Male. Eyes hairy. Antennæ yellow. Cheeks, yowls and the 

 lower part of the back of the head with long yellow hairs. Thorax 

 brownish black with a pair of approximate, whitish pruinose stripes, 

 abbrcviated behind; the stripes are best seen when the thorax is 

 wieved from behind and they are often indistinct: the thoracic disc is 

 densely clothed with reddish yellow hairs. on the pleura are longer 

 hairs. Abdomen reddish ; first segment black, slightly bluish : a yellowish 

 white spot on the second segment, on each side, at the hind margin, and 

 a similar pair on the third segment, generally iiarrowly united along 

 the hind margin; the foUowing segments with the hind margins some- 

 what pale, in the middle of the second, third and foiirth segments a 

 somewhat indistinct, black spot. Venter chiefly reddish with the lirst. 

 narrow, segment greyisii black. Abdomen clothed with short, depressed. 

 yellowish red hairs. Legs reddish; femora more or less brownish black: 

 the legs short haired, coxæ and anterior femora with longer hairs. 

 Wings yellowish, most distinctly towards the anterior margin, veins 

 brown. ilalteres yellow. 



Female. More robust than the male, and generally quite ferrugineous, 

 also the logs, and without or almost wilhout any designs; eyes hairy, 

 narrowly separated. 



Length 10 to nearly 20 mm. 



