42 CEROPLASTES CISTUDIFORMIS. 



of specimens of this remarkable insect. Dr. Jordan 

 informs me that the insect was originally discovered on 

 an orchid at Harrow by Mr. James O'Brien in 1897, 

 and the Hon. H". Charles Rothschild tells me (1901) 

 that it is still " cultivated at Tring for the sake of its 

 beauty, and that it reproduces in numbers every year 

 and dies." It does not apparently increase in numbers 

 or injure the plant. 



Distribution. Mr. Cockerell's types were from 

 Guanajuato, Mexico, on Bignonia and Chrysanthemum. 



EXPLANATION OF THE PLATE. 



PL XLII, fig. 1. Female insects natural size in situ 

 on a portion of an orchid (Chrysis bractescens) . a, old 

 adults ; b, young adults. 



Fig. 1 c. Old adult female. X 2. 



Fig. 2. Leg of old adult female. X 140. 



Fig. 2 a. Tarsus and claw of same. X 300. 



Fig. 3. Antenna of old adult female. X 140. 



Fig. 4. Dorsal dermis of old adult female. X 140. 



Fig. 5. Spiracle of old adult female. X 140. 



Fig. 6. Young adult female after treatment with 



potash (ventral). X 10. 



Fig. 7. Antenna of young adult female. X 140. 

 Fig. 8. Tibia and tarsus of young adult female. 



x 140. 

 Fig. 9. Stigmatic spines of young adult female. 



X 300. 



Fig. 10. Dermis of young adult female. X 600. 

 Fig. 11. Young adult females, showing two stages 



(a and b) of the tests or pellicles. X 7. 

 Fig. 12. Fully-developed larva or first stage female. 

 X 10. 



