634 siE G. F. HAMPSON ON THE [June 1, 



is t3'pical of the group. This diversity is usually correlated with 

 the development of various other secondary sexual characters, one 

 of the most common and remarkable being an ear-shaped tympanic 

 vesicle at the base of the costa of fore wing covered by a drum of 

 fine corrugated membrane. 



A carefully elaborated classification of most of the genera was 

 published by the late E. M. Eagonot in the ' Annales de la Societe 

 Entomologique de Prance ' ^ ; but a large number of the species 

 wei'e unknown to him, and his material was insufficient for him to 

 discover the large amount of sexual dimorphism that exists. He 

 defined the Chri/sangince as diifering from the Endoirichince in 

 being stoutly-built insects, and includes in the latter subfamily 

 many of the genera which by my definition fall into the former : 

 the paper, however, formed a most important contribution towards 

 a correct classification of the group, which was originally defined 

 and systematized by Lederer in 1863. 



None of the genera are of a very generalized structure, but 

 Chrysauge itself, apart from its secondary sexual characters, is 

 regarded as the least specialized, with its short porrect palpi and 

 median nervules of both wings arising from the cell in its 1st section. 

 Erom it were developed a group of genera with doAvncurved palpi, of 

 which forms like Anemosa and Pelasgis have very long palpi ; Semnia 

 with the palpi smooth and a tuft of bair on the antennae; Uliosoma 

 and Anitia with one of the median nervules absent in one or both 

 wings ; Condylolomia with veins 2 and 3 of the fore wing stalked ; 

 Itambe and Microzanda with extremely falcate fore wings ; Macna 

 with very long straight palpi in female, upturned and angled with 

 hair in front in male ; Psectrodes and An-odegmia with very long 

 palpi ending in a large rounded tuft of hair on 3rd joint. 



Another large group of genera have the palpi upturned, of 

 which the majority have short palpi, such as Sthenoha'ci with vein 4 

 of hind wing absent ; Dasycnemia with veins 4, 5 of both wings 

 stalked ; AnisotJirix without a frontal tuft ; Bucuma with tufts of 

 hair on frons, mid tibife, and tarsal joints, and excisions in the 

 costa of fore wing ; whilst a few genera have very long upturned 

 palpi, culminating in Tamyra with a rounded brush on 3rd joint. 



A very curious structure found in several of the genera, of 

 which Casuaria is typical, is the development of the retinaculum 

 into a complete ring, the frenulum being thickened, flattened, 

 contorted at base and with a short lower fork ; this form being 

 associated with a glandular swelling and tufts of hair on under- 

 side of costa of fore wing and the tympanic vesicle on upperside 

 mentioned above. 



Subfamily CHUTSAUGrN^. 



Proboscis well-developed ; palpi of extremely different forms in 

 the different genera ; maxillary palpi absent ; frons usually with a 

 tuft of hair. Pore wing with vein 7 stalked with 8, 9 in female ; 



^ Ann. Soc. Ent. Fr. 1890, pp. 435-546; and 1891, pp. 15-114 & 559-662, 

 plateB5, 7, 8,&16. 



