42 PROCEEDINGS OF THE AMERICAN ACADEMY. 



the variations which have been examined that which occurs on 

 Asphaera nobilitata in Trinidad is the most striking, and would 

 undoubtedly be referred to a distinct species were there not variations 

 which occur on other species of the genus which approach so closely 

 to the type form that even a varietal separation seems undesirable. 

 This Trinidad form is very large, and grows either on the elytra 

 or at the base of the anterior legs of its host, its color is paler than 

 that of individuals from other species of Asphaera. The perithecium 

 is distinguished by an often well developed neck-like base formed from 

 the lower tier of wall-cells, and is usually bent abruptly outward 

 from the appendages. The latter are very stout and long. Larger 

 specimens have the following measurements: perithecia 225 X 35 fx; 

 appendages 480 /jl; receptacle 280 X 40 /x; total length to tip of 

 perithecium 400 ju. In this and several other forms the cells, of the 

 receptacle, especially, contain a distinctly yellow or orange proto- 

 plasm, the color of which is apparently due to the peculiar yellow 

 juices which fill the bodies of many of the Chrysomelidae. 



The hosts on which forms referable to L. Homophoetae have been 

 found are as follows: 



(a) Homophoeta sp., No. 2475b and H. aequinoctialis Linn., No. 

 2475, Port of Spain, Trinidad: on H. 6-gutta'a Say, No. 1791, Brazil; 



(b) Systena sp., No. 1640, Los Amates, Guatemala (Kellerman); 

 on S. basalts Jac, Nos. 2489 and 2490, Hayti (Mann): on S. 5-littera 

 Linn.; Nos. 2469 and 2470, Port of Spain, Trinidad; No. 2479, 

 Suriname (Rorer); No. 1769, Teapa, Mexico (Biologia Coll.). 



(c) Psylliodes sp., No. A+, Jamaica (Brues). 



(d) Disonycha sp. No. 1843, Guatemala (Kellerman); on D. 

 recticollis Jac, No. 1769, Costa Rica (Biologia Coll.) and No. 1642, 

 Guatemala (Kellerman). A dark form with numerous short rather 

 slender curved appendages hardly ever reaching to the tip of the 

 perithecium, their inner margins conspicuously indented at the septa. 



(e) Oedionychus sublineata Jac, Teapa, Mexico, No. 1772, (Bio- 

 logia Coll.). A paler form, straight, with few straight appendages, 

 the largest specimen measuring 500 /x to the tip of the perithecium. 



(f) Monocesta atricornis Clk., No. 2221, Manaos, Amazon, (Mann). 

 A small dark form with few very long scanty appendages, the recepta- 

 cle small, the perithecium bent abruptly against the appendages which 

 may reach 425 n in length, although the total length to the tip of the 

 perithecium is only about 120 /jl. 



(g) Lactica scutellaris Oliv., No. 1754, Balaclava, Jamaica, W. I. 

 A form similar to that on (f) but with straight perithecium. 



