122 



mediate in general colour, being less of a mouse grey. It is a small 

 form. 



3. form darwiniana. — This is a form which occurs in the southern 

 Alps, and is more or less racial, with the white band uniform in 

 width, but the apical spot is not in alignment ; the row of eye- 

 spots lie as in the typical form, and are in many specimens much 

 enlarged ; the general colour of the upperside is much darkened 

 with the black areas somewhat extended. 



When shown in mass these three forms were clearly distinct and 

 well marked. 



4. C. iphis. — This species is closely allied to C. arcania, and 

 occurs in numbers locally over a very large area of the Palaearctic 

 region. Series were shown from the Rhine, Belgrade, Modling 

 near Vienna, the Hohe Tatra, the Alps, etc., with specimens fromN. 

 Central Asia, and Thian-shan. They all somewhat resembled forms 

 of C. an-ania, but were readily distinguished by having only rem- 

 nants (generally two irregular clouds) of a white band on the hind- 

 wings below, and on the upperside were uniform blackish brown. 

 The eyespots vary from none to a complete row on the hindwing 

 below, and are small and very sharply defined. The race mahome- 

 tana, from the Thian-shan, are delicately dusted over with white 

 below, the race iplii)ia, from Central Asia, has the eyespots bordered 

 with orange ; and those of a darker shade were known as ab. 

 snb)Ui/ra. 



Mr. W. J. Lucas read a paper entitled "The second maxillae 

 (labium) of the Odonata, more especially as the mask of the naiad 

 stage," and illustrated his remarks with a series of lantern slides. 

 (See page 57.) 



NOVEMBER 23rd, 1922. 

 Annual Exhibition. 



Messrs. A. de B. and 0. R. Goodman exhibited four cases con- 

 taining 83 out of the 118 species of butterflies known to inhabit the 

 French Pyrenees and adjoining districts; collected in July, 1922. 



I. Insects from Vernet-les-Bains, in Eastern Pyrenees, and from 

 Pont du Gard, near Nimes. Papilio podalirlua var. feisthamelii, the 

 dark southern form of the summer brood. Pieris manni, showing 

 the characters distinguishing it from /-*. rapae. Enchloe enpJienoides, 



