a Sackbearing Bomhyx. 5 



tennoe, are more constant for tlie larger groups of Lepidoptera than 

 the wing neuration, which in the Bombycidce varies much. 



I cannot find that Dr. Harris mentions in what month the imago 

 made its appearance in Massachusetts : Mr. Edward Doubleday 

 took botli sexes in Virginia in July. 



Sp. 2. Pcrophora Batesii. 



Tota testacea : oculis nigris, alis punctis nigris irroratis, fascia 

 lineari, saturatiori, communi, obliqua ante anticarum apicem 

 retrorsum angulatd, lunuldque apevtd centrali, signatis. 

 Corp. long. $ -9 unc; 2 M unc. Alar, dilat. ^ 1-4 unc; 



$ 2-2 unc. 

 Hab. Sabuletis apud Santarem Americse Meridionalis larva in- 

 volucre vitam degens, Byrsominarum et Melastomaruvn folia de- 

 vorans. 



Larva of Perophora Batesii. — The larva is enclosed in a some- 

 what spindle-shaped case, which has a circular aperture at each 

 end: it is constructed of portions of two leaves joined together 

 along the sides with admirable nicety ; a slight seam is visible, 

 but it is almost impossible to detect the mode in vshich the junc- 

 tion is effected. The head and dorsal surface of the protho- 

 rax are black and rough ; the dorsal surface of the meso- and 

 metathorax are yellow, with two longitudinal black vittae; the 

 abdomen is ovate and bulky, of a yellowish or olivaceous colour 

 above, and sprinkled or marbled with dusky atoms, and a yellow 

 vitta running along each side just below the stigmata. The under 

 surface of the head, three thoracic and two next following abdo- 

 minal segments is black, that of the remaining abdominal segments 

 is a ruddy flesh colour. There are six thoracic legs as usual, 

 and ten very sliort prolegs or claspers, viz. a pair on the fith, 7th, 

 8th, 9th and anal segments. Mr. Bates found a considerable 

 number of these larvae in their cases, each attached by two or 

 three strong threads to the leaves of low bushes of Byrsoniinae and 

 Melastoinae, and also to blades of grass in open sandy situations, 

 near Santarem, in May last, towards the end of the rainy season. 



Pupa of Pcrophora Batesii. — Mr. Bates records that the trans- 

 formations of the pupa are completed within the case, but he gives 

 no description of the pupa ; neither does he seem to have trans- 

 mitted one for examination. 



