264 



THAXTER. — MONOGRAPH OF THE LABOULBENIACE^E. 



than those from Maine and were found on the inferior surface of the abdomen of a small Hydroporus. 

 They correspond with the types, however, in all essentials. 



Chitonomyces Floridanus Thaxter. Plate XXXIV, figs. 36-38. 

 Proc. Am. Acad. Arts and Sci., Vol. XXXV, p. 430. April, 1900. 



Pale straw colored with a smoky, brownish tinge, the basal and subbasal cells relatively large, the 

 former rather elongate, the latter broader than long, the distal cell erect, conical, appendiculate, its basal 

 septum horizontal. Perithecium relatively large, distally somewhat inflated, the posterior margin to the 

 apex nearly straight, the tip moderately well distinguished, the inner margin strongly convex between 

 the tip and the secondary appendage ; the lip-cells each forming a more or less distinct papilla. Spores 

 relatively large about 35 X 3 p. Perithecia 70 X 28 p. Receptacle, distal part, G2 p, the two basal 

 cells with foot 52 p. Total length to tip of perithecium 120-138 p. 



On Cnemidotus 12-punctatus Say, Eustis Florida, October. On legs and elytra. 



An insignificant species superficially resembling H ydraeomyces but structurally different. The 

 hosts were captured on the margin of Lake Eustis near the landing. 



Chitonomyces occultus Thaxter. Plate XXXIV, figs. 30-31. 

 Proc. Am. Acad. Arts and Sci., Vol. XXXVII, p. 30. June, 1901. 



Short and stout, becoming suffused with somewhat smoky amber-brown. Lower portion of the 

 receptacle deeper brown, the basal cell relatively large, broad distally; the subbasal cell broad and flat- 

 tened; the lower cell of the distal portion rather large and but slightly overlapped by the subterminal 

 cell, which may bulge slightly below the terminal cell, the latter being thus turned so as slightly to over- 

 lap the perithecium. Perithecium short and stout, its upper third or less free, darker brownish exter- 

 nally; the tip bent outward, tapering rather abruptly to the slightly irregular apex, its outer half or less 

 suffused with dark brown. Spores about 22 X 2.5 p.. Perithecium GO X 20 p. Receptacle to tip of 

 distal cell 90 p. Total length to tip of perithecium 100 p. 



On the right elytron of Cnemidotus sp. Lake Eustis, Florida. 



This characteristic little form grows concealed in a depression of the margin near the middle of 

 the right elytron and would readily remain unnoticed unless sought for. 



Chitonomyces paradoxus Peyritsch. 

 Specimens of this form have been obtained on species of Laccophilus from Lake Eustis Florida, 

 and again from L. minutus and L. hyalinus from Europe (British Museum No. 487, England, and Berlin 

 Museum Nos. 1053-1054, from Europe), and a well marked variety, Plate XLII, fig. 39, has been ob- 

 served on a small Laccophilus from Java (Rouyer, No. 1396). This is distinguished by its more slender 

 straighter habit, by the more erect and slender terminal horn-like perithecial outgrowth, and by the 

 conformation about the pore. It grows in exactly the same position as the type form, and though a well 

 defined variety, should not, I think, be specifically separated. 



Chitonomyces dentiferus Thaxter. Plate XXXIV, figs. 26-27. 

 Proc. Am. Acad. Arts and Sci., Vol. XLI, p. 306. July, 1905. 

 Pale straw-colored. Receptacle nearly straight, the foot large, the basal cell about twice as long 

 as broad, but slightly broader distally, the subbasal cell broader than long, distinguished above and 

 below by a more or less distinct constriction, the lower marginal cell longer than the next above it, the 

 terminal cell subcylindrical with broadly rounded apex bent slightly inward. Perithecium distally 

 curved inward above a suberect, tooth-like, unicellular appendage, which is curved slightly outward, and 

 originates above a rounded more deeply colored prominence, which subtends it and lies nearly opposite 

 the extremity of the distal appendiculate cell of the receptacle, which it about equals in length. The tip 

 of the perithecium tapering, the lip-cells slender and somewhat elongate, with rounded extremities. Total 

 length to tip of perithecium 90-110 X 18-20 p. Perithecium about 65 X 18 p. Basal portion of recepta- 

 cle about 35 p. Spores about 28 X 3 p. 



