62 THE CANADIAN ENTOMOLOGIST 



in two long slender lobes which are curled up and give the appearance of being 

 jointed beyond the middle. (See fig. 1). 



Pro thorax remarkably developed as in others of the group, dull black, 

 finely punctate, and with yellow margins. The thorax is of like colour and 

 texture, short shining white pilose posteriorly and laterally, the rest brownish 

 pilose. Two widely separated, short yellow lines on the anterior mesonotum, 

 and a yellow curved mark outside these on the lateral margin. Two oval 

 yellow spots in front of the scutellum, and a yellow spot above the postalar 

 callosities which runs down across them. Scutellum black with a yellow hind 

 margin. Pleurae black with a yellow mark in front of the wing. 



Abdomen black, the lateral margins yellow, broadly on the second, the 

 yellow reaching across on posterior margins of segments some distance. First 

 segment very short. On the dorsal margin of the second, third and fourth are 

 small median yellow triangles. The sixth segment is black with a yellow margin. 

 Squamae with narrow margin and almost transparent membrane. The pile 

 on th2 abdomen is rather short, recumbent and shining in certain lights. 



Legs yellow, femora blackish brown, pale beneath, the base and tips yellow. 

 Tibiae and tarsi yellowish brown. Wing venation typical, the membrane strong- 

 ly rippled and infuscated light brown. 



Explanation of Plate II. 



Fig. 1. Megalyhus gracilis Ph. 



la. Outline drawing of head from front and greatly enlarged figure 

 of frons and the region around it. 



Fig. 2. Thyllis compressa? Erich. 



2a. Head and thorax from above. 

 2b. Outline of head fron front. 



2c. Drawing showing eyes meeting above and below the insertion 

 of the antennae. 



AN APPEAL FROM BELGIUM. 



The following letter has been received from the Curator of the Entomo- 

 logical Section of the Royal Museum of Natural History of Belgium: 



[Translation. 



Brussels, 11-1-1919. 

 Dear Sir: 



It is absolutely necessary that you write some notices in the American 

 scientific journals in order to save the Selys Catalogue. I have lost twenty 

 subscriptions in Europe and I must retrieve them in the United States. 

 Financial aid from the de Selys family is impcssible for a long time. Each new 

 subscription will bring a little capital to the reconstitution of this work which 

 can be brought to a termination with a little energy and with the aid of all. 

 The great institutions, libraries, etc., ought to put some of their pennies into 

 subscriptions 



