196 Ö. R. Osten Sacken: 
(Lorraine) is the same as T. pilipes. I saw a type-specimen in 
Mr. E. Perris’s collection, now preserved in the Agrieultural college 
in Montpellier. 
The larva and pupa of T. pilipes were described by Mr. Beling, 
Verh. Z. B. Ges. 1878, p. 48. The larvae were found in the sand 
of a half dried brook. 
The character of this genus from which the name is derived, 
the abrupt diminution in size of the three last joints of the antennae 
is not always perceptible in dried specimens; it also remains to be 
proved that it occurs in the numerous exotie Trimierae. 
Chionea. 
Dalman, K. vetensk. Acad. handl. 1816, p. 102, Tab. 2, fig. 2; id. 
Analecta etc. 1823. 
O. Sacken, Monographs etc. IV, p. 168. 
Both european species (©. araneoides and crassipes) occur very 
far north in Sweden (compare Zett. Dipt. Scand. XI, p. 4256), as well 
as in central Europe (for instance near Vienna; compare Loew, Jahrb. 
d. k. k. Krakauer Gel. Ges. Vol. 41, Ueber die auf d. galizischen 
Seite des Tatra-Gebirges beob. Dipteren, Note 5). One of them has 
been found in the Appenines in Italy. The usual abode of Chionea 
is under moss and stones; they have been found late in autumn 
(near Würzburg, Leydig, üb. die Verbr. d. Thiere im Rhöngebirge 
und Mainthal, in the Verh. d. Nat. Ver. d. Preuss. Rheinl. u. West- 
phalen, Jahrgang XXXVIII) and also as late as April (Girschner, 
Entomol. Nachr. 1887, p. 131). Chionea is chiefly nocturnal; Graven- 
horst (Uebers. d. Arb. d. Schl. Ges. 1848, p. 90) observed the copula; 
he merely says that the female seems to take the initiative. Prof. 
Mik (in litt.) gave me an interesting account on the same subject: 
„the upper valves of the ovipositor prevent the male from getting 
on the back of the female; it lies on its own back, in the direction 
of the longitudinal axis of the body of the female; when the latter 
is walking it drags the male, who raises himself on his hind legs to 
an almost perpendicular position; this serves to explain the unusual 
incrassation of these legs.” 
Psilonocopa. 
Zetterstedt, Fauna Lapponica, 1840, p.847, Dipt. Scand. X, p. 4007. 
In the Monogr. ete. Vol. IV Psiloconopa should have been in- 
serted after Chionea, as Gen. XX; strike it out on page 177. 
It is closely allied to Trimiera and has the same venation; 
a more exact definition of the difference between the two genera is 
