THAXTER. — 



MONOGRAPH OF THE LABOULBENIACEjE. 



335 



by the insertion-cell. Apart from slight differences in the depth of tlic suffusions, the Javan, Chinese and 

 Japanese material shows no variations worthy of note. Fig. II represents an individual from Cochin 

 China, Paris Museum, No. !), which is taken as the Type. 



Laboulbenia Nebri.k Peyr. 

 Specimens of this species were obtained in the British Museum No. 458 on Nrbria GyUenhali Sch., 

 from Whallen, England: in the Paris Collection on .V. rubicunda Qnens., from Algeria, No. '42. Berlin 

 Museum No. cSG3, on N. angustata Dcj., Tyrol, No. 866 on N. angusticollis Dej., France. 



Laboulbenia vulgaris Peyritsch. 

 The varieties of this species and its near allies on species of Bcmbidium are in need of thorough re- 

 vision and illustration, which 1 have deferred until it becomes possible to examine the large amount of 

 material which I have collected in South America and elsewhere, but which is not yet available for study. 

 It may be mentioned here, however, that material from Greece, Italy, the Canaries, India, Japan and the 

 Hawaiian Islands has been obtained from the European Collections. 



Laboulbenia insularis Thaxter. Plate LVI, figs. 1-2. 

 Proc. Am. Acad. Arts and Sri., Vol. XXXV, p. 181. Dec, 1899. 



Perithelium one third or more free, inflated, dark brown, becoming almost opaque, tapering to the 

 rather pointed apex, the lip-edges hyaline. Receptacle elongate, the distal portion concolorous with the 

 perithecium; cell I suffused with brown above and belov\ , cell II hyaline except for a brown suffusion at 

 its base and distal end. Outer appendage consisting of a large subcorneal basal cell becoming dark brown 

 and bearing terminally a single short erect slender branch, the two basal cells of which are dark blackish 

 brown, the septa usually oblique; the distal cell somewhat longer than the rest of the appendage, hyaline 

 and soon broken. The inner appendage consisting of a very small basal cell, usually producing a single 

 short hyaline branch about as long as that of the outer appendage. Perithecium 85-95 X 40 fi. Total 

 length to tip of perithecium 215-275 to insertion-cell 200-250 fi. Appendages, longest 100 



On Bcmbidium sublimatum Woll., and B. Grayanum Woll., Brit. Mus. No. 409, Island of St. Helena. 



This species, though most nearly allied to L. vulgaris, differs constantly from forms of that species in 

 the character of its appendages; the outer short, slender, more or less indurated, simple, externally suf- 

 fused with rich brown, is partly broken in all the adult individuals examined, but is shown from young 

 individuals, fig. 2, to be but slightly longer than is represented in fig. 1. 



Laboulbenia perpendicularis Thaxter. 

 A few specimens of a form not separable from this species were found on the legs of Bcmbidium 

 atlanticum Woll. from Teneriffe: British Mus., No. 420. 



Laboulbenia subterranea Thaxter. 



The different forms which seem referable to this species are very perplexing; especially those from 

 European caves, which are seldom very like the striking American type-form, yet correspond too closely 

 to some of its variations to warrant a specific separation. The European species of Trcchus, furthermore, 

 are not infrequently parasitized by a form illustrated on Plate LIII, figs. 14-15 which, though strikingly 

 different from the types of this species, are so nearly identical with its varieties that I have not thought it 

 wise to separate them at present. This variety is characterized by the possession of a simple, usually 

 rigid, stiff outer appendage, the lower cells of which are apt to be more or less elongated, and sometimes 

 of variable diameter, or distally somewhat enlarged as in the two figures referred to. The species ap- 

 proaches some forms of L. polyphaga, although it is always sufficiently distinct to be readily recognizable. 

 On several European species of the staphylinid genus Stilicus I have also found a form that I am not able 

 to separate satisfactorily from the varieties above mentioned, although it is usually somewhat smaller. 



