386 



'1HAXTER. MONOGRAPH OF THE LABOULBENIACEyE. 



Var. prolix a Thaxter. Plate LVII, fig. 11. 

 Proc. Am. Acad. Arts and Sci., Vol. XXXVIII, p. 29. Juno, 1902. 



Perithecium straight or slightly curved, large and greatly elongated, the body opaque; the neck 

 usually elongate, hyaline or translucent. Receptacle as in the type, but usually translucent brownish 

 yellow. Branches of the appendages usually more numerous and more slender, the two main branches 

 of the inner often consisting of from three to four cells. Spores 70 X 5 (i. Perithecia 365 540 X 55 ft, 

 including the stalk (90-220 X 36 /<)■ Appendages 220 ft. Total length to tip of perithecium 450-670 fi. 



On Mesoihriseus tricolor Sharp, Molokai, No. 1239; M. collaris Sharp, No. 1240, Molokai; Met- 

 romenus mqualis Sharp, No. 1200, Oahu; and on No. 1235, Maui, in Perkins Collection. 



Var. spectahilis Thaxter. Plate LVII, fig. 12. 

 Proc. Am. Acad. Arts and Sci., Vol. XXXVIII, p. 30. June, 1902. 



Perithecium large, long, tapering more or less symmetrically above and below, strongly curved (or 

 often recurved) outward throughout its length, including the clearly distinguished hyaline neck; dark 

 olive brown, becoming nearly opaque, the black tip slightly distinguished, the lip-edges hyaline. Recep- 

 tacle as in the type. Appendages as in the type, but one or both of the primary branches of the inner 

 appendage hyaline, contrasting, many celled, and variably elongated through continued terminal pro- 

 liferation, black branchlets arising one from each successive cell and alternating on opposite sides of 

 the primary branch, often very long, curved upward and inward so as to cross one another, when two 

 primary branches are present, with such regularity as often to form a lattice-work pattern; the series 

 often complicated by the production of copious slender hyaline branchlets from the upper side of the 

 secondary branches. Perithecia, main body, 165-200 X 40-48. Total length of appendages 290-360 p.. 



On Hawaiian Carabida? from Perkins Collection: No. 1261, on Metromenus caliginosus Blk., Hono- 

 lulu, Oahu; No. 1179 and No. 1259 (Type); on M. mutabilis Blk., Oahu; Nos. 1254 and 1256, on M. 

 latifrons Sharp, Molokai. 



It has been with some hesitation that I have separated the three forms included under this species 

 as varieties, yet repeated recomparison of my material has only served to convince me that, although 

 three species are probably in process of differentiation here, it is better to consider them varieties. L. 

 cauliculata (typica) might well be separated from L. spectabilis, yet between them lie various modifications 

 of L. prolixa which cannot be separated on the one hand from the type, and on the other from L. specta- 

 bilis. The latter, which is one of the most beautiful and striking forms in the whole group of Laboul- 

 beniales is characterized by the form and curvature of the perithecium and of its slender more abruptly 

 distinguished neck, as well as by the more luxuriant, though variable, development of the branches of 

 its inner appendages. An extreme illustration of this is represented in fig. 12; but in no respect does 

 this branching differ, except in its luxuriance from that of L. prolixa. The latter form on the other 

 hand, although distinguished in general by its larger size, and large elongate perithecium and neck, 

 varies to less striking forms which cannot, I think, be distinguished from the usually smaller type-form 

 of L. cauliculata. Although the habit of the receptacle differs in all three varieties, the appendages do 

 not differ greatly from well developed specimens of L. Disenochi, the main axis of the outer appendage, 

 and of the primary branches of the inner, differing from the fact that in the present species the branch- 

 lets alternate on opposite sides of the main axis, and that these branchlets, in L. prolixa and L. spectabilis 

 especially, give rise to often very long slender and copiously developed unilateral hyaline branchlets. 



Of the accompanying figures fig. 8 represents a type from Colpocaccus Lanawnsis var.; fig. 9 from 

 host indet. No. 1246; fig. 10 from Metromenus paudator: fig. 11 (L. prolixa), Type, on Mcsothriscus tri- 

 color Shp.: fig. 12 (L. spectabilis) Type on Metromenus mutabilis Slip. 



Laboulbenia Mexicana Thaxter. 

 Although the appendages of this as well as of the succeeding species bear no very close resemblance 

 to the type which I have distinguished as the " Galerita type," it seems more than probable that they rep- 



