THAXTER. — LABOULBENIALES PARASITIC ON CHRYSOMELIDAE. 29 



the base. Insertion-cell broad and thick; basal cell of the outer 

 appendage externally more deeply suffused and slightly convex, 

 separated by an oblique blackened septum from its outer branch which 

 is short, submoniliform, and usually four-celled; a second branch 

 arises within the outer, its basal cell about equal to -that of the outer, 

 but bearing two branchlets, radially placed ; consisting of four or five 

 short cells like those of the outer branch, extending usually not more 

 than two thirds the length of the perithecium, towards which, like the 

 outer, they are usually slightly bent; basal cell of the inner appendage 

 slightly smaller than that of the outer, bearing a branch on either 

 side consisting of a single cell terminated usually by a pair of antheri- 

 dia, which may also be associated with one or two short stout branch- 

 lets like the outer. Perithecium free, except its basal cells, becoming 

 quite opaque; convex on both sides, more abruptly so externally; 

 tapering distally to the rather narrow tip; the apex sometimes slightly 

 apiculate; the lip-edges hyaline, or translucent. Perithecia (above 

 basal cells) 100-125 X 40-48 /x- Spores about 55 X 5.5 p. Recepta- 

 cle 150-200 X 45-52 fx. Longest appendages 90 m (usually broken). 

 Total length to tip of perithecium 60-90 ll. 



On the elytra and under surface of Haltica plebeia Oliv. No. 1785, 

 Hayti (M. C. Z.); on Haltica sp. Cuba, (M. C. Z.), No. 1784; and 

 1787; No. 1770, on Haltica amethystina Oliv., Vera Paz, Biologia Coll. 

 on H. Jamaicensis Fab., No. 2491. Ennery, Hayti (Mann); No. 

 2506, Jamaica. 



This is a very ordinary looking species, of more or less uniform 

 dark, dirty olive-brown color, apparently very common on its hosts 

 in Hayti and Cuba. It is perhaps as nearly allied to L. partita as to 

 any of the other species on Chrysomelidae, but never appears to de- 

 viate in structure from the ordinary type of the genus. The material 

 is usually poor, even on hosts preserved in alcohol, and the outer 

 branch of the appendage is seldom found in adults. 



Laboulbeni Halticae now sp. 



Dull olivaceous, the perithecium and distal portion of the receptacle 

 somewhat darker. Receptacle normal, or occasionally cells III and 

 IV replaced by a single cell, slender, but little broader distally; cells 

 I and II subequal, or I slightly longer; cells III and IV subequal; 

 cell V reaching down to, or nearly to, cell III and sometimes equaling 

 it in size. Insertion-cell thick, deeply suffused, but not opaque: 



