262 



MONOGRAPH OF THE LABOULBENIACE.E. 



(3) R. arbussulus Thaxtcr, on gen. indct., near Lathrobium, Africa. 



(4) R. longissimus Thaxter, on Colpodes evanescens Bates, N. America. 



(5) R. furcatus Thaxter, on Othius fulvipennis Fabr., Europe. 



(6) R. hypogseus Thaxter, on Anophthalmias Bilimeki Sturm., Europe. 



(7) R. Lathrobii Thaxter, on Lathrobium longiusculum Grav., Lathrobium sp. indet., N. 



America. 



(8) R. pilosellus (Robin), on Lathrobium fulvipenne Grav., Europe. 



Genus XII. Chjstomyces. Receptacle a simple series of superposed cells, the appendages 

 and perithecium forming a single vertical series. 



(1) C. Pinophili Thaxter, on Pinophilus latipes Er., N. America. 



Genus XIII. Sphaleromyces. Receptacle two-celled, the single simple appendage bearing 

 a series of antheridial branchlets superposed in a single row. 



(1) S. Lathrobii Thaxter, on Lathrobium nitidulum Lee, L. punctulatum Lee, N. 



America. 



(2) S. occidentalis Thaxter, on Pinophilus densus Lee, N. America. 



Genus XIV. Compsomyces. Receptacle two-celled, the upper cell bearing the appendages 

 and stalked perithecium in a whorl. Perithecium with two stalk-cells, the lower appendiculate. 

 (1) C. verticillatus Thaxter, on Sunius longiusculus Mann., N. America. 

 Genus XV. Moschomyces. Receptacle two-celled, several arising from a compacted 

 cellular base intruded into the body cavity of the host. Perithecium borne on two stalk-cells, 

 the lower appendiculate. 



(1) M. insignis Thaxter, on- Sunius prolixus Er., N. America. 



GROUP II. Exogenae. Antherozoids produced exogenously. Typically aquatic. 

 Order. Zodiomyceteae. 



Genus I. Ceratomyces. Appendage tapering with lateral branches, receptacle few-celled, 

 wall-cells of perithecium seven or more in each row. 



(1) C. mirabilis Thaxter, on Tropisternus glaber Hb., T. nimbatus Say", N\ America. 



(2) C. confusus Thaxter, on Tropisternus glaber Hb., T. nimbatus Say, N. America. 



(3) C. camptosporus Thaxter, on Tropisternus glaber Hb., N. America. 



(4) C. minisculus Thaxter, on Tropisternus nimbatus Say, N. America. 



(5) C. filiformis Thaxter, on Tropisternus glaber Hb., T. nimbatus Say, N. America. 



(6) C. rostratus Thaxter, on Hydrocombus fimbriatus Melsh., Philhydrus cinctus Say, P. 



nebulosus Say, N. America. 



(7) C. terrestris Thaxter, on Lathrobium punctulatum Lee, N. America. 



(8) C. furcatus Thaxter, on Berosus striatus Say, N. America. 



(9) C. contortus Thaxter, on Berosus striatus Say, N. America. 

 (10) C. humilis Thaxter, on Berosus striatus Say, N. America. 



Genus II. Zodiomyces. Receptacle parenchymatously multicellular, the numerous peri- 

 thecia surrounded by sterile appendages arising from its cup-shaped extremity. 



(1) Z. vorticellarius Thaxter, on Hydrocombus lacustris Lee, IT. fimbriatus Melsh., and sp. 

 indet., N. America. 



