Studies on TipuUdae. 179 



declared Ctedonia to be a synonym of tlie australian genus Cfyno- 

 plistia, wliich belongs to the Section L i mno philin a. Indeed the 

 venation, as represented by Philippi, the coitrse of the auxiliary vein, 

 the Position of the veins round the Stigma; the shape of the discal 

 cell and the course of the last vein issuing from it (intercalary vein), 

 are all characteristic of the Section Limnophilina. The structure of 

 the antennae is very like that of Gynoplistia. 



The first Ctedonia I had an opportimity of seeing was a speci- 

 men labelled Ct. flavipennis Phil. (Chili) in Mr. Bigot's collection. 

 It has nothing to do with Gynop>listia, and belongs to the Tipulidae 

 longipalpi; it is a remarkable new form of the Section Tipulina, 

 with pectinate antennae and without nasus. Now supposing the 

 species to have been well determined, and Ct. hicolor to have been 

 well-represented in the above-quoted figure, the genus Ctedonia be- 

 comes a Compound of at least two heterogeneous forms (about the 

 other two species described by Philippi we know nothing yet). 



Philippi's generic and specific descriptions afford no light on 

 this dilemma. The generic description contains the words: „Alae 

 fere omnino ut in Tipula", which would perhaps apply to Ct. flavi- 

 pennis^ rather than to Ct. hicolor, but not necessarily so. — I have 

 takeu the foUowing description of the generic characters of Ct. flavi- 

 pennis from the two specimens in Mr. Bigot's collection; it may 

 be of use to those who will have to deal with Ctedonia in future. 



R s t r u m as long as the head, without nasus; p a 1 p i as in 

 Tipula^ last Joint whiplash-shaped, although not very long. Antennae 

 ($) about oue half longer than head and thorax together; joints of 

 the scapus short; two first joints of the flagellum short, subcylin- 

 drical, emitting each a long, filiform brauch on the underside; the 

 following ten joints emit each a long, filiform brauch on their upper 

 side; all these branches are longer than half the antenna, some of 

 them perhaps nearly as long as the whole antenna; they are more 

 or less curled and beset with soft hairs; the end of the antenna is 

 filiform, unbranched; I can count four or five joints on this end, 

 but it seems as if the tip was broken off. (The male antennae, with 

 their long, soft branches remind me of those of the coleopteron 

 Phengodes). Thorax and abdomen Tipula -like; the end of the 

 abdomen in the male but little clavate. Legs as in Tipula; tibiae 

 with large spurs at the end. Venation of Tipida; the auxiliary 

 vein ends in the first vein and is not connected by a crossveiu with 

 the Costa; the first vein is incurved towards the anterior brauch of 

 the second and ends in it; the oblique crossve'in usually connecting 

 the end of the first vein with the costa is very indistinct here and 



12* 



