THAXTER. NEW LABOULBENIACEAE. 55 



Laboulbenia Texana Thaxter. 



An examination of further material from tropical or subtropical 

 species of Brachinus seems to indicate that several forms, two of which 

 have already been described as species, are better associated as varieties 

 of this remarkable type. The simplest of these is that I have formerly 

 described as L. tibialis, while L. rostellata is perhaps the most peculiar. 

 The varieties may be enumerated as follows : 



Var. Tibialis. On Brachinus sp. from Eustis, Florida. 



Var. Rostellata. On the same host and from the same locality. 



Var. incurvata nov. var. Corresponding closely to the type in the 

 form and coloration of the receptacle. The outer appendage nearly 

 straight, divergent, hardly incurved, becoming more or less brownish, 

 relatively somewhat longer and more tapering than in the type, the 

 subbasal cell producing from its left side a short well-developed fi ve- 

 to six-celled branch, recurved, and bearing branchlets of the charac- 

 teristic type from its convex side ; the second cell producing on its 

 concave side a two-celled branchlet, the lower cell of which bears one 

 and the distal two of the characteristic branchlets. The inner appendage 

 closely resembling that of the type, hyaline, incurved, its third cell pro- 

 ducing a well-developed similar branchlet from its concave side. Peri- 

 thecium as in the type, but the tip quite different, narrow, bent abruptly 

 inward at right angles, the lips compressed. On Brachinus geniculatus 

 Dej., Montevideo, Uruguay ; Berlin Museum, No. 992. 



Var. pendula nov. var. Longer and more slender than the type ; cell 

 V not greatly broadened, so that the perithecium and appendage diverge 

 but slightly. The outer appendage nearly erect, brown, relatively very 

 long, tapering ; one or sometimes more than one of the three lower cells 

 producing externally or laterally well-developed branches of the char- 

 acteristic type, which are long, slender and more or less pendulous. 

 The inner appendage recurved, more or less pendulous, relatively 

 slender and similar to a well-developed branch which arises on its inner 

 side from the third cell above its base. Perithecium nearly erect, the 

 tip well distinguished, bent slightly inward ; the lips somewhat spread- 

 ing. On Brachinus geniculatus Dej., Montevideo, Uruguay; Berlin 

 Museum, No. 992. On the inferior surface of the prothorax. A form 

 somewhat similar also occurs on B. lateralis Dej. from Oaxaca, Mexico 

 (Brit. Mus., No. 721) ; a single specimen only having been obtained it 

 is impossible to say how constant its differences may prove. 



