1918] CoccidcB of Cuba 161 



ities, Jardin Botanica del Institute Segundo Ensenado de Cuba 

 (Habana), Jardin Botanica de la Universidad de Habana 

 (Habana), Santiago de las Vegas. Dates, Jan. 27, 1909; Feb. 2, 

 1909; Oct. 11, 1908; Oct. 21, 1908; Feb. 8, 1909; Feb. 16, 1909. 

 Collectors, W. T. H., J. S. H., M. T. C. Note.— The so-called 

 setae of Comstock's description are dorsal wax pores. 



Howardia biclavis detecta Mask. 

 Host, Spanish pear. Locality, Jardin Botanica de la Univer- 

 sidad de Habana, (Habana). Date, Jan. 27, 1909. Collector, 

 J. S. H. Note. — Although the mounted insects resemble true 

 biclavis Comst. in every respect, the specimens are placed under 

 the variety detecta Mask, because the scale is not covered with 

 bark. This according to Maskell differentiates the two. The 

 bark of Spanish pear is very hard and smooth, so that it would 

 seem almost impossible for a scale to mine beneath it ; hence, it 

 is the belief of the writer that the mining habit of biclavis 

 Comst. is regulated by the food plant upon which it occurs and 

 that the variety detecta Mask, is not valid. Further evidence 

 on the point is brought out by an examination of a series of 

 infested plants grading from those with soft and corky or 

 flaky bark to those with a hard leathery sort. The insects are 

 almost entirely hidden when they occur on the soft or flaky- 

 barked sorts and that the quantity of covering gradually 

 decreases as the opposite extreme is approached. 



Diaspis boisduvalii Sign. 

 Host, Coconut. Locality, Baracoa. Dates, March 22, 1907; 

 June 14, 1907. Collector, W .T. H. Note. — The writer is unable 

 to place these specimens in any other species than D. boisduvalii 

 Sign., though the insects at hand differ in several respects from it. 

 The lateral margin of the median lobes is not attached to the 

 body along its entire length, but the tip of the lobe is free. See 

 Comstock (Report of Cornell University 1883, p. 87). In these 

 specimens there is a distinct triangular projection between the 

 median pair of lobes which is not figured by either Comstock 

 or Newstead. The spines vary from Comstock's description; 

 the second pair instead of being mesad of the plate between the 

 first and second lobes is situated upon the median margin of the 

 broad plate bearing the opening of the large dorsal wax pore 

 between the first and second lobes. In his Monograph of the 



