Eversmannia. 407 



92. CveFsmannia R. D. 



Species of medium size and dark, pale priiinose colour. Head 

 fully as broad as thorax, convex behind and puffed out below, higher 

 than long. Frons narrow in male, broad in female, strongly conically 

 protruding, the head almost triangular in profile. Jowls not broad, 

 about one third of the height of the eye. Male without, female with 

 two orbital bristles. Behind postocular bristles a row of black hairs. 

 Frontal bristles descending to the middle of the cheeks, the upper- 

 most transverse in female. Cheeks with a few hairs above, for the 

 rest bare. Vibrissæ not ascending, only a couple above the large 

 vibrissa. Eyes hairy. Epistoma straight, strongly retreating, slightly 

 reflected below and oral aperture short. Oral bristles well developed, 

 but few on account of the short aperture. Antennæ inserted at middle 

 of the eye, third joint about thrice as long as second; arista with 

 second joint somewhat elongated. Thorax rectangular; three post- 

 sutural dorsocentrals and three præ- and three postsutural acrosti- 

 chals; præsutural intraalar bristle small or wanting. Scutellum with 

 four marginal bristles on each side, the apical small, crossing. Three 

 sternopleural bristles. Pteropleura with a long bristle above. Ab- 

 domen ovate; excavation on second segment reaching hind margin; 

 there are discai and marginal bristles, second segment without 

 bristles. Legs with claws and pulvilli small, about equal in both 

 sexes; in female front tarsi with the four last joints dilated. Wings 

 with first posterior cell narrowly open, ending somewhat near apex 

 of wing, discai angle rectangular, without veinlet; cubital vein with 

 four to six distinct bristles on basal part; no costal spine. 



The species is known as parasite on Geometridae and belongs 

 to Pantel's group 4 (Thompson 1923). 



Of the genus only one species is known, also occurring in Den- 

 mark. 



1. E. ruficauda Zett. 



1838. Zett. Ins. Lapp. 643, 38 et 1844. Dipt. Scand. III, 1110, 107 {Ta- 

 china). — 1862. Schin. F. A. I, 464 {Exorista). — 1891. B. B. Denkschr. Akad. 

 Wiss. Wien, LVIII, 382 (Micronychia). — 1907. Kat. palåarkt. Dipt. III, 220. 

 — 1921. Baer, Zeitschr. f. angew. Ent. VII, 135. — 1924. Stein, Arcli. f. Natur- 

 gesch. 90, 6, 55. — Tachina maculipennis Zett. 1844. 1. c. III, 1092, 89. 



Male. Frons narrow, protruding; cheeks above half as broad 

 as the eye, narrowing downwards. Orbits greyish, face more whitish 

 pruinose, jowls grey; frontal stripe black. Orbits with fine sparse 



