Entomological Notes. 437 



more robust than the former and darker coloured (both of 

 which have the fore-wings apparently naturally truncated 

 not extending to the extremity of the abdomen), with the 

 note "parasitic on the three-toed sloth. Para. Many 

 found." From the information I received with the last- 

 mentioned specimens, I believe it was among the hairs of 

 the Brady pus that the moths had either been reared or 

 had taken up their abode. These moths are now in the 

 Oxford Museum. 



Lastly, I recently obtained from a collection of Lepi- 

 dopterous insects, sent by Mr. Thelwall from Lake Nyassa, 

 and folded in paper, a small moth, measuring 13 lines in 

 the expanse of its broad semi-transparent white fore-wings, 

 marked beyond the middle with a few irregularly-placed 

 black scales and having strongly bipcctinated black an- 

 tennae, which seemed to me allied to the Psyche fusca, 

 although having somewhat the appearance of a male 

 Orgyia. With this moth was enclosed the empty cocoon 

 or rather hard horny coarctate puparium of a Tachina, with 

 the note that the moth had been reared from the latter. 

 If such had really been the case, I think the larva of the 

 moth must simply have taken advantage of the empty 

 puparium in which to undergo its transformation. 



DESCRIPTION OF THE FIGURES. 

 Plate X. C. 



Fig. 1. — Eiiryhrachis spinosa? magnified, with the parasite attached to 

 the dorsal surface of its abdomen. 



Fig. 2. — The parasite seen from below, showing the six thoracic legs 

 and eight ventral prologs, and part of the suspending mem- 

 brane. 



Fig. 3. — The extremity of the body of the parasite, sliomng the manner 

 in which the membranous attachment is seized by the anal 

 prolegs of the parasitic larva. 



3. On the Lepidopterous genera Himantopterus, Wesmael, 

 and Thymara, E. Douhleday. 



The genus Himantopterus was founded by M. Wesmael 

 in the Bulletin of the Royal Academy of Brussels for 

 1836, for the reception of a very remarkable Javanese 

 insect, still unique, then in the collection of the late 

 M. Robyns, where I had the opportunity of examining it, 



TRANS. ENT. SOC. 1877. — PART IV. (DFX'.) II 11 



