3S4 IIR. B. M'LACHLAW on the NYMPH-STAGfi OF THK EMBIDiE. 



sector deep black aud strong, the other veins fine and inconspi- 

 cuous ; 4-5 evident pale costal veinlets, and three veinlets in both 

 pairs between the radius aud the upper branch of the sector ; but 

 there are no other transverse veinlets ; hence the discoidal cell is 

 open ; four very narrow whitish longitudinal lines. 



A well-grown larva is 12 millims. long. The antennae much 

 shorter than in the imago. The colours generally lurid-fuscous 

 rather than blackish, with the posterior portion of the head, the 

 whole prothorax, and the legs more or less testaceous ; and the 

 whole underside is pale ; the abdominal segments above with a 

 brownish tinge, clothed with sparse yellowish haii's ; the caudal 

 appendages present ; just the same asymmetry as in the imago. 



A starved " nymph " is only 9 millims. long. The colours simi- 

 lar to those of the larva : and the form also generally similar ; but 

 the legs are more slender (as in the imago), the asymmetry in the 

 caudal appendages less striking (is it of the same sex ?). The ru- 

 dimentary wings elongate-oval, with evident neuration, character- 

 istic of the genus ; the anterior extending to the posterior margin 

 of the metanotum, the posterior to the posterior margin of the 

 second dorsal abdominal segment. 



This is the species alluded to at the commencement of this 

 paper, found by Mr. Michael in one of his hothouses among plants 

 of Saccolohium retusum imported from India. In its wing-struc- 

 ture it agrees generically with 0. Saundersii, which is also an 

 Indian species. 



DESOEIPTION OF PLATE XXI. 



Fig. 1. Oligotoma Michaeli, a full-grown larva shown about six times its natural 

 size. 



2. The nymph-stage of the same insect (possibly in a starved condition), 



also enlarged six times nat. size. The dotted lines on the right hand 

 of the figure denote wing-outline as when expanded. 



3. The perfect insect of 0, Michaeli, magnified six times nat. size. 



