Til A XT KR. — MONOGRAPH OK THE LABOULBENIACE E. 



385 



Laboulbenia sim n i; i i'sis Thaxter. Plate LVII, fig. 5. 



Proo. Am. Acad. Arts and Sci., Vol. XXXVIII, p, 5:;. June, L902. 

 Perithecium free, projecting at rigid angles to the axis of the receptacle or recurved, opaque, blackish 

 brown, slightly asymmetrically inflated below, the tip not distinguished, very broad, truncate or bluntly 

 rounded, concolorous. Receptacle relatively slender, hyaline, cells I and II relatively very large, the res! 

 small; cell I shorter, often tinged with brown; cells II and III edged with blackish brown externally; 

 cell IV wholly blackish brown; cell V hyaline or partly suffused, the insertion-cell thick. Basal cell of 

 the outer appendage more or less suffused, giving rise to an outer and an inner branch; the basal cell of 

 the former giving rise to an outer, shorter, and an inner hranchlet; the inner branch simple: basal cell 

 of the inner appendage bearing a simple branch, distally furcate above its basal cell; the branchlcts both 

 fertile, short, with a single terminal antheridium; or one of them sterile and similar to the outer appendage, 

 short, stout, nearly straight, stiff, opaque, hyaline-tipped: the antheridia relatively large, solitary; the 

 broad neck bent abruptly at right angles. Perithecia 90-110 X 40-4S p. Receptacle 220-250 n. Ap- 

 pendages 150-185 /<. 



On Metromcnus caliginosus Blk, Oahu, Honolulu, M. epicurus Blkm. No. 1261, and No. 12G2. No. 

 125G on M. lafifrons sp. Molokai Mts., Maui. Perkins Collection, Hawaiian Carabidae. Right inferior 

 surface of prothorax. 



This species, which is allied to both L. Ilawaiicnsi.s and L. Disenochi, is well distinguished by its 

 peculiar hammer-like habit, and absolutely opaque blunt perithecium. The slender, nearly isodiametrie 

 pcritheeium is at first quite hyaline, but may become slightly soiled with yellowish brown, as well as 

 deeply suffused externally below the insertion cell. The type form on M . caligino.sus was obtained from 

 several individual hosts always in the same position and does not vary. The form on 3/. epirunts and M. 

 latifrons is slightly different, in that the perithecium does not project at right angles from the receptacle, 

 is somewhat narrowed toward the tip, while the stiff black branchlets of the appendages are distally en- 

 larged, having a club-shaped habit. 



Laboulbenia cauliculata Thaxter. Plate LVII, figs. 8-10. 

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



Perithecium short and stout, straight or slightly curved, inflated more prominently on its inner side; 

 dull olivaceous brown, translucent, or becoming opaque; the basal wall-cells forming a well-defined pale 

 olivaceous or hyaline narrow stalk; the tip black, broad, not distinguished, except by its color; the rather 

 coarse, but not prominent, lip-edges hyaline and outwardly oblique. Receptacle relatively short and 

 small, the basal cell usually curved, narrow and subhyaline below, becoming opaque and punctate dis- 

 tally; the subbasal cell having only a small portion of its posterior margin free, cell III being subtriangular 

 and overlapping it ; cell IV nearly as broad as, and somewhat larger than cell III, separated from cell V, 

 which may equal it in size, by a vertical or but slightly oblique septum; cells II— VI mostly translucent 

 yellowish brown, often becoming opaque. Insertion-cell rather broad: basal cells of the appendages 

 hardly distinguishable, the outer giving rise abruptly to usually two erect, or slightly divergent, stiff, 

 bristle-like, curved branches, which are blackish brown, externally opaque, producing short hyaline 

 branchlets along their hyaline inner margins: the basal cell of the inner appendage producing a branch 

 on either side consisting of from one to two cells from which arise several branchlets similar to those of 

 the outer appendages. Spores 58 X 5 p.. Perithecia 125-165 X 45-60 //, including stalk (18-22 //). 

 Receptacle 90-100 X 35-40 p. Appendages 125-185 p. Total length to tip of perithecium 220-290 p. 



On Colpocaccus Lanaiensis Sharp, No. 1226; C. marginatus Sharp, Kaui, No. 1228; on Atelothrus 

 deprcssus Sharp, Lanai, No. 1231; A. constrictus Sharp, Molokai, No. 1234; Mesothriseus Hawaiiensis 

 Sharp, Hawaii, No. 123S; M. altcrnans Sharp, No. 1220, Kaui, No. 1242, Maui, 1241 and 1244 Oahu; 

 M. viuscicola Blkm., No. 1236, Tahura; Mctromenus Jraudator Sharp, Nos. 1253, 1255, Maui; on other 

 numbers of the Perkins Collection of Hawaiian Carabidae as follows: Kaui, Nos. 1246-1248; Molokai, 

 No. 1250; Mam*. Nos. 1214, 1253, 1255. 



