Explanation of Plate. 539 



Explanation of Plate XXXII. 



All the figures are the natural size. 



Fig. 1. — The Thyridid moth, Dracenta rusma, Druce, showing 

 the upper surface. Tunapuna, Trinidad, 1905, L. Guppy. In Coll. 

 W. J. Kaye. 



Fig. 1a. — The under surface of the moth shown in Fig. 1. The 

 cryptic resemblance is seen to be more detailed than that of the 

 upper surface, including black fungus-like patches which present an 

 appearance of standing out in relief. It is probable that during rest 

 the lower surface is exposed as much as the upper, and perhaps even 

 more completely. 



Fig. 2. — The Locustid, Plagioptera bicordata, Serv. Each of the 

 green tegmina is marked by two transparent patches with brown 

 outlines and marked by brown lines. These patches probably 

 resemble the injuries caused by a leaf-attacking fungus. The trans- 

 parent patches, save for their small number and much larger size, are 

 singularly like those on the totally different insect represented in 

 Fig. 1. Colombia, S. America. In Hope Dep. 



Fig. 2a. — The under surface of the Locustid shown in Fig. 2. 

 The appearance resembles that of the upper surface, which in this 

 case is probably the only one exposed during rest. 



January 23, 1907. 



