BOMBYCID^. 289 



three- fourths as long as the fore wings and pectinated on their 

 basal halt'. The fore wings are a little shorter than the body and 

 the hind wings reach to the tip of the broadly tufted abdomen. 

 Endea Monitor Pack, is cinnamon brown, with a large irregular 

 green patch in the middle of the fore wings. We named 

 this species from the striking resemblance of the larva to the 

 iron-clad " Monitor." It is very regularly elliptical, flattened 

 above, and a broad conspicuous brown spot in the middle of 

 the back reminds one of the "cheese-box" or turret. Long, 

 fleshy, bristling spines arise from each end of the larva. 



Empretia stimulea Clemens (Plate 8 ; Fig. 1 ; 1 a, larva) is 

 our largest species of this group. The moth is rarely found by 

 collectors, and is of a rich, deep velvety brown, with a reddish 

 tinge. There is a dark streak along the basal half of the me- 

 dian vein, on which is situated a golden spot, while there are 

 two twin golden spots near the apex of the wing. It expands 

 an inch and a half. The larva is thick and elliptical, the body 

 being rounded above, but flattened beneath, and a little fuller 

 towards the head. There is a pair of densely spinulated tuber- 

 cles on each side of the segments, the snbdorsal pair on the 

 metathoracic ring, and a pair on the seventh abdominal ring, 

 being two-thirds as long as the body is wide. There are three 

 pairs of small, but well developed thoracic legs, while there are 

 none on the abdominal segments. The body is reddish, with 

 the upper side green between the two largest pair of spines, 

 centred with a broad elliptical reddish spot, edged with white, 

 as is the green portion along the side of the body. According 

 to Mr. S. I. Smith, of New Haven, from whom the specimen 

 figured was received, the larva feeds on the raspberry. He 

 states that the hairs sting, as its specific name indicates. The 

 cocoon is rounded, almost spherical, and is surrounded with a 

 loose w r eb, the whole structure being over three-fourths of an 

 inch in length. The moth appeared June 18th. 



Phobetrum has narrow wings, and the male is very unlike the 

 fi'inalc, which has been raised by Mr. Trouvelot, and was con- 

 founded by us with the Thyridopteryx ephemerceformis of Ha- 

 worth. Its antennae are very broadly pectinated, and the 

 remarkably lonir, narrow fore wings are partly transparent. 

 Thyridopteryx ni<j, !<<!, is Pack, must be considered as belonging 

 19 



