EXPLANATION OF PLATE IV. 
Aleurodes persex. 
38. Pupa-case. 
39. Vasiform orifice, operculum, and lingula of pupa-case. 
40. Portion of margin of pupa-case. 
Aleurodes quercus-aquoticae. 
41. Pupa-case. 
42. Portion of margin of pupa-case. 
43. Outline of vasiform orifice, with the surrounding fluted rim. 
44. Fore-wing of adult. 
j 1 le u rodes sp irxo ides. 
45. Pupa-case. 
46. Portion of margin of pupa-case. 
47. Vasiform orifice, operculum, and lingula of pupa-case. 
48. Fore-wing of adult. 
49. Hind-wing of adult. 
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