458 UKl'oKT OF OFFICE OF KXPKRIMKNT STATIONS. 



Miss Soutliworth, and it was dcti'rmincd l>y Mr. Kllis as Miji'itoujUon 

 (/i/rf';e/\iun\ is so roportcd hyliini," Ixit with tlic follow inn- note: "The 

 nn^asurrnuMits of asci and sporidia arc from the Fiorichi specimens; 

 those fi'om more northei'n localities have the sporidia mostlv smaller. 

 'V\w Florida specimens also ditl'cr from those found in (he noithciii 

 States in the absence of any free margined, thalloid, elligurate suhicn- 

 lum." 



In this specimen the fungus is situated on und among a muss of the 

 same purple scale, though this is not noted l»y eithei- Mr. Kilisor Mi.s.s 

 Soutliworth. This is <learly a Myriangium, since the peculiar cellular 

 stromatic masses ha\(' luunei'ous ascioei-al cavities, each containing a 

 single sul)oi'l)iculai' ascus, with muriform, hyaline spores. The asci 

 and spoi'es certainly clo.sel}' reseml)le those of .1/. curtixii^ which is 

 usually regarded as a synonym of J/] (hiriifl^ and is a frequently 

 occurring hark parasite on variou.s trees and shrul)s in the southern 

 States; l>ut l)esides the lack of a sterile etHgurate subiculiun, as noted 

 b}'' Mr. Ellis, the stromatic masses are flattened oi' slightly curved and 

 not somewhat cup-shaped, as is usual in JA ciirf/sll. One small piece 

 of the Porto Rico material shows asci and spores that agree perfectly 

 with this Florida specimen. The others noted above are sterile and 

 of a harder consist(Micv, although the vouni^ stayes look exactlv like 

 the ascus-bearing .specimen. The further study of more abundant 

 material will be necessaiy for a full understanding of this interesting 

 species. 



The white fungus, described below under Lecanium, was occasion- 

 ally found on tli(> purple scale, })ut only when it had crept over from 

 neigfhboring infected individuals of the Lecanium. It does not seem 

 to be primarily a parasite of the purple scale. 



(2) The chaify scale {Dtaxjris pent<i<i<nui). — This occurs ver}- com- 

 monly on the oi'ange, as well as on various other trees and plants. It 

 is attacked to some extent by the black fungus mentioned above, l)ut 

 no other parasite was o])ser\'cd on it. On account of this lack of 

 enemies it seems to be increasing more rapidh' than either of the other 

 orange scales and is, perhaps, more likeh' than any of the others to 

 become seriously troublesome. 



(3) The '''' aiit cojo'''' {Lecanhitn hemisphaeficum). — This well-known 

 greenhouse pest occurs on the orange in Porto Rico, usually attacking 

 the young succulent twigs. It is heavily parasitized by a minute, 

 white mold-like fungus ''(^Sy-'^-'/'o/r/V'////;;/ (?)sp.) that is first seen protrud 

 ing from luider the margin of the scale, but it soon completeh- envel- 

 opes and destroys it. The fungus produces immense numbers of 

 exceedingl}' minute conidia that serve for its rapid propagation. 



«North American Pyrenoniycote.'*, 1892, p. fi21. 



''This fuiigiLS panu^ite occurs in (rrenada ami Barbados. See Scale Insects of the 

 Wast Indies. H. Maxwell-Lefruy, West Indian Bui. M, l!t02, p. :^14. 



