CATALOGUE OF DIMORPHIDES, ETC. 841 



(Tutt), Grisons (Killias), Zurich dist., distributed but not common (Riihl), Valais — 

 Morgins (Dupont), not rare in the Rhone Valley— nr. Martigny, Mt. Chemin, 

 Sion, Sierre, Viege, Brigue, &c. (Favre). 



ADDENDUM. — Gynandromorphism. — The following instance of 

 gynandromorphism has been unearthed since the printing of pp. 



309-313— 



1". I have bred a specimen of Saturnia pavonia this spring, which has the left wings 

 like those of the $ except the costal margin of the hindwing, and the right wings 

 like those of the ? ; the body resembles that of the ? , but is small ; the antennae 

 are more pectinated than those of the ? , but not so much as those of the $ ; the 

 white blotch on the tip of the forewings is larger and brighter than usual, the span of 

 the wings about the same as that of a large $ (Milton, British Naturalist, iii., 

 p. ill). 



Catalogue of the Pal^earctic Dimorphides, Bombycides, 

 Brahm^eides and Attacides. 



In giving a list of the Palaearctic Attacids we note the follow- 

 ing suggestions, for which we are indebted to Chapman, as to the 

 affinities of this superfamily. All the authorities agree that there 

 are five main divisions — the Hemileucids, Citheroniids, Automerids, 

 Agliids, Attacids — in the Holarctic fauna. The questions that have 

 arisen are as to (i) the order of their evolution, and (2) their relationship 

 inter se. The greatest amount of doubt appears to attach to the 

 position of the Hemileucids. The true relationships of the others 

 do not appear so difficult to determine. The Hemileucids are 

 certainly near the bottom of the stirps, teste the two anal nervures of 

 the hind wings. They also differ from the others in having a single 

 pair of pectinations to each antennal segment. Bodine considers 

 (Antennae, etc., p. 43) that this shows that the Hemileucids belonged 

 to the branch which produced the later families, after it had 

 separated from the branch giving rise to the Bombycidae. Chapman, 

 accepting Dyar's statements as to the structure of the larvae, 

 thus formulates the following table for the Holarctic families : 



1. Imago: Hindwings with two inner anal nervures ; IV X and IV 2 of forewings 

 separate; antennae bipectinate. Larva : Single dorsal tubercle on 9th abdominal; 

 urticating setae. 



a. Primitive form lost 



b. IVj and IV 2 forked . . . . . . . . Hemileucids. 



2. Antennae quadripectinate 



c. Partially only. Larval urticating setae lost . . ClTHERONHDiE. 



3. Hindwings with one inner nervure 



d. .. .. .. .. .... .. AUTOM.ER.IDiE. 



4. Urticating setae lost ; no single tubercle on 9th abdominal segment 



e. .. .. .. .. .. .. .. Agliid.-e. 



5. Nervures IV X and IV 2 forked . . . . . . SATURNIIDS. 



e. Discoidal cell closed. No unpaired dorsal tubercle 



on 8th abdominal . . . . . . . . . . Saturnhns. 



f Discoidal cell open. An unpaired dorsal tubercle 



on 8th abdominal . . . . . . . . . . Attacin.e. 



The following appears to be a complete list of the Palaearctic 

 Dimorphids, Bombycids, Brahmaeids and Attacids : 



Dimorphides. 

 Dimorphids. 



DlMORPHINS. 

 DlMORPHIDI. 



Dimorpha, Hb. 

 versicolora, Linn. 

 ab. pallida, Tutt 

 ab. pallida-obsoleta, Tutt 



ab. obsoleta, Tutt 



ab. clara, Tutt 



ab. obscura, Tutt 



ab. obscura-obsoleta, Tutt 



var. lapponica, Bau 



Bombycides. 



Bombycids. 



BOMBYCINffi. 



