( cxliv ) 



the Arctiinae apart from the Lithosiinae, we find perhaps more 

 diversity in the former ; Rhodogastria, for example, appears to 

 retain several primitive characters, among others the tegumen 

 appears to be almost undeveloped. The genus Diacrisia 

 with its type sannio has advanced much, its organs being 

 very simple, but as represented by such species as turbida, 

 pratti, dinawa and their near allies, it is decidedly complicated 

 in its genitalia. It is difficult to say what is primitive and 

 what is of more recent development ; the two sections should 

 certainly be separated. In Parasemia and in Syntomis we 

 find remnants of ancient characters in the superdigital pro- 

 cesses attached to the upper margins of the harpagones, in 

 Syntomis they are specially interesting in that they are 

 asymmetrical. Arctia has also these organs, only they are 

 not finger-like, being decidedly more bulky. Callimorpha 

 has advanced considerably in its very simple tegumen and 

 also in the simple structure of the harpagones. The genus 

 Maenas, so far as I have as yet investigated, would appear to 

 have the most highly developed genitalia, in that they are the 

 simplest of all. 



Diacrisia sannio, L., 



the type of the genus, has the tegumen more developed in 

 the dorsal and subdorsal areas, with a single uncal extremity, 

 fused with it, not articulated as usual ; the harpago has a very 

 short deeply hollowed ventral plate, and is somewhat irregular 

 in shape; the sedoeagus is elliptical, tapering smaller to the 

 orifice, with a large vesica very finely shagreened. 



It appears to me from other structural characters that such 

 species as turbida, dinawa and all their allies must belong to 

 another genus. 



Diacrisia dinaiva, B.-B., 



is a very good representative for another section of the 

 genus, probably for a new genus ; the cingula, having a simple 

 hood-shaped saccus, is practically a continuous collar, but it 

 shows the line of union between the tergite and sternite by 

 a deepish indentation ; the tegumen is a beak-shaped structure 

 along the dorsal line, the anus ascending with the girdle and 

 having its orifice just below and behind the apex of the tegu- 



