76 



ff. Caudal spines adjacent ; two of them shorter than the 



other two Psorosina Dyar. 



dd. Tenth abdominal segment with lateral hooked setae similar 



to the caudal setae Canarsia Hulst. 



cc. Caudal end of body with a transverse row of six long hooked 

 setae of equal length; epicranial suture never present; head 

 wdth a prominent pointed cephalic projection. 



Pinipestis Grote. 



The following species were examined : 

 Plodia inter punctella Hiibner 

 Bphestia kuehniella Zeller 

 Acrobasis ruhrifasciella Packard 

 Mincold indigindla Zeller 

 Meroptera pravella Grote 

 Psorosina hammondi Riley 

 Canarsia nhniarrosorclla Clemens 

 Pinipestis zimmcrmani Grote 



Subfamily Pyraiistinae 



This group is distinguished by the peculiar "shouldered" appear- 

 ance of the body, caused by the great width of the thorax as compared 

 with the head and by the position of the labrum, which is always 

 cephalad of its normal position and often located near the cephalic end 

 of the body. There is never a furrow on the dorsum between the 

 ninth and tenth abdominal segments. The maxillary palpi are always 

 present and only a very small portion of the labial palpi is exposed. 

 The epicranial suture is present in all genera. The mesothoracic legs 

 and antennae, together with the metathoracic legs which are hidden 

 by them, usually extend beyond the caudal margin of the wings. The 

 mesothoracic spiracles often have peculiar ridges along their caudal 

 margin which are sometimes covered with setae. Similar ridges are 

 found in certain families of Papilionoidea and Notodontoidea. The 

 shape of body and arrangement of parts in the Pyraustinae resembles 

 that of certain Sphingidae, and would seem to indicate that the 

 Pyraustinae are not as closely related to the Phycitinae as the other 

 subfamilies, which all show a very close relationship. The genus 

 Pyrausta as understood at present probably does not represent a 

 natural group. Of the species studied P. fissalis and P. illihalis have 

 long narrow cremasters of similar type, while P. fntilalis and P. in- 

 sequalis have short broad cremasters of rather different types. There 

 is also great variation in the length of the appendages, but this is not 

 such a decided generic character as the form of the cremaster. This 



