4 THE ENTOMOLOGIST. 



Polycentropus mtricatus, n. sp. 



Anterior wings fuscous, thickly irrorated with golden yellow 

 spots, the dark portions of the anterior wings, especially the spots 

 on the costal margin, being rather pronounced, as in P. kingi. In 

 the male the dorsal plate, in dried specimens, is gradually dilated to 

 the apex, which is shallowly excised for the greater part of the hind 

 margin. At the base, on either side, is a small triangular lobe. The 

 superior appendages are elongate, their form best seen from beneath, 

 concave, with a basal, inwardly directed process with rounded apex ; 

 the tips inturned and hooked. Intermediate appendages slender, 

 first divergent then approximated, and afterwards abruptly turned 

 outwards. Inferior appendages obtuse, concave; on the inferior 

 apical portion punctate in a prepared example. Expanse of anterior 

 wings, 14-16 mm. 



Laruns, September 3rd and 4th. 



In studying this new species I had occasion to make prepara- 

 tions of all the European forms of which I possessed adequate 

 material, including all the described species excepting those 

 which are known exclusively from the Iberian peninsula. The 

 figures given here (3 to 7) show the apex of the abdomen from 

 the under side. The dorsal plate is not shown at all. This 

 plate (tenth tergite) is in the genus a rather thin, membranous 

 structure, liable to shrivel when treated with caustic potash, 

 and also, from its transparenc}^ sometimes difficult to define. 

 The parts shown are the inferior appendages (genital feet of 

 Klapalek and others), the superior appendages {appendices prcB- 

 anales), and, lastly, what McLachlan termed the intermediate 

 appendages (" chitingraten " of Ulmer). The genital feet and 

 the appendices pneanales are the true genital appendages, and 

 are attached to the ninth abdominal segment. The " chitin- 

 gniten " are probably j)roccsses of the tenth segment. The term 

 " intermediate appendages " employed by McLachlan has no 

 definite morphological meaning, having been used by him to 

 designate different parts in different groups or genera. 



In the figure of Jiavomaculatus the appendices prceanales are 

 not shown. In fig. 2 alone is the penis indicated. 



Explanation of Figures. 



1. Polycentroptis intricatus, n. sp. Apex of abdomen from above. 



2. ,, ,, ,, ,, from side. 



3. ,, ,, Apex of abdome-n from beneath 



(more enlarged). 



4. P. Jcingi, McLach. Apex of abdomen from beneath (more enlarged). 



5. P. excisus, Klapalek. ,, ,, ,, 



6. P. midtiguttatus, Curt. ,, ,, ,, 



7. P . flavomaculatus, Pict. ,, ,, ,, 



a, inferior appendages ; 6, superior ajDpendages ; c, intermediate appen- 

 dages. 



