119 



The members of this subfamily have been treated as the family 

 Nycteolidae by some authors, but there is no evidence in the pupae 

 to separate them from the family Noctuidae. 



The following species were examined : 

 Sarrothripus revayana Scopoli, proteella Dyar. 



Family Arctiidae 



The members of this family all possess distinct setae arranged 

 around the scars of the larval verrucae. These setae are seldom con- 

 spicuous enough to be seen with the naked eye as in Liparidae, but 

 are easily visible with the aid of the microscope. The labial palpi are 

 never visible, unless as small triangular areas caudad of the labrum, 

 except in Halisidota, where they are exposed for their entire length. 

 The femora of the prothoracic legs are never visible. The shape of 

 the body is characteristic, being slightly concave on the dorsum in 

 the region of the metathorax (Fig. 104). Certain genera of Noctuidae, 

 Acronycta, Eulonche, and Charadra, also show setae arranged around 

 the scars of the larval verrucae. In the two genera first named, both 

 labial palpi and prothoracic femora are exposed, while Charadra pos- 

 sesses a long cremaster bearing hooked setae. Those genera of 

 Arctiidae with a cremaster never have hooked setae, but all cremastral 

 setae are flattened at the distal end. The epicranial suture is never 

 present in any member of this family. The prothorax is usually long, 

 often half the length of the mesothorax as in most Noctuidae. The 

 genus Ctenucha, included with the Syntomidae in Dyar's list, shows no 

 characters to distinguish it from the Arctiidae and it is probable that 

 other genera of this family should be included here. The genera of 

 Arctiidae may be separated as follows : 



a. Abdominal segments 5-7 never with a flanged plate along the ce- 

 phalic margin, or with deep furrows between these segments when 

 the body is retracted ; maxillae nearly as long as the wings ; mesotho- 

 racic wings never meeting on the meson caudad of the appendages, 

 b. Dorsal surface of abdomen flattened; body broadly rounded at 

 caudal end and bearing a row of short setae which are slightly 

 curved at tip ; body brown, concolorous. 

 c. Labial palpi showing for about one sixth of the length of the max- 

 illae; body 18-20 mm. in length; dorsal surface of abdomen 



never with depressed areas Halisidota Hiibner. 



cc. Labial palpi never showing except as a small triangular piece 

 about a millimeter in length ; body 12-15 mm. in length ; dor- 

 sal surface of abdomen with depressed areas on meson of each 

 segment at cephalic margin and one on each side adjacent to the 

 spiracles Eucliaetias Lyma». 



