Dec. 1S9S] DYAR : On SOUTH AMERICAN MOTHS. 231 



Table 2, groups the mites, beetles and flies, which have been held to be especially 

 significant as time-indicators, and shows that the same species have been found after 

 widely varying periods of interment. This is in direct contrast with the "principle" 

 hitherto deduced, from observations on exposed cadavers, " that the products formed 

 at different epochs in the progress of decomposition attract certain forms and repel 

 others." A principle which Megnin reiterates in a recent " Note sur une collection 

 dTnsectes des cadavres interessants a connaitre au point de vue Medico-legal, offerte 

 au Museum." 



NOTES ON CERTAIN SOUTH AMERICAN 

 COCHLIDIIDiE AND ALLIED FAMILIES. 



By Harrison G. Dyar. 



At my request Mr. W. Schaus kindly brought me a number of 

 moths from his collection for examination. Many of them are his 

 types of species recently described and the rest have been carefully 

 determined by him. The following notes are based on this material. 

 It includes the groups closely allied to the Cochlidiidje as well as that 

 family itself, and one species of Ptilodontidse, which was improperly 

 described as a Cochlidian. 



Family DALCERID^E. 

 Synopsis of Genera. 



Fore' wings without accessory cell ; antennae with prominent scale tuft at tip. 



Vein 6 arising above discal vein ; vein n from cell Dalcera 



Vein 6 arising below discal vein ; vein II stalked with g and io. . . . Dalcerina 

 Fore wings with accessory cell ; antennae without scale tuft. 



Veins 9 and 10 long stalked, but distinct Acraga 



Veins 9 and 10 coincident, 9 absent or invisible. 



Hind wings ovate, rounded Dalcerides 



Hind wings trigonate, inner margins long hpipinconia 



Genus Dalcera H. -S. 



1855— Dalcera Hekrich-Schaffer, Ausser. Schmett. I. 7. 



Type, abrasa H.-S.: also //ana/a Schaus, both before me. Mosch- 

 ler has given the generic characters. Others species listed are obscura 

 Schs., alba Druce, laxata Druce, ampla Druce and leberna Druce, but 

 I have not examined them. 



