THAXTER. 



— MONOGRAPH OF TIIK f j A BO I ' L I { K \' I A ( ' K A<] . 



405 



Var. pendula Thaxter. Plate LXIII, fig. 

 Proc. Ain. Acad. Arts and Sci., Vol. XXXVIII, p. 55. June, 1902, 



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 ereet, 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 characteristic 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 spreading. On Brachinus geniculates Dei., 

 Montevideo, Uruguay; Berlin Museum, No. 992. On the inferior surface; of the prothorax. 



A very large and striking form, to which the pendent branches of its appendages give ;i graceful babit. 

 Unlike the var. incurvata, which occurs with it, the two basal cells do not form a stalk clearly distinguished 

 from the distal portion of the receptacle, and although cells IV and V are greatly enlarged, they arc so 

 arranged as to bear the appendages in the usual vertical position. 



Var. Oaxacana nov. var. Plate LXIII, fig. 7. 

 Perithecium suffused with rather dark brown, tapering and curved slightly inward from about the 

 middle to the tip, which is abruptly distinguished, subcapitate, the lips translucent only about the pore. 

 Receptacle somewhat bent, the subbasal cell broader and several times longer than the basal cell ; both 

 evenly suffused with pale dirty brownish and contrasting in color with the darker brown distal portion, 

 which is concolorous with the perithecium, except cell V, which is somewhat paler, indistinctly marked 

 by transverse striae, and prolonged upward and outward beside cell IV, carrying the insertion-cell out 

 free from the perithecium almost horizontally. Outer appendage long tapering and slender, the lower 

 half suffused with dirty brown, the distal hyaline; the successive cells bearing distally and externally 

 small branches without blackened basal septa. Total length to tip of perithecium 550 /*. Perithecium 

 200 X 85 ii. Appendage 400 (i. Receptacle to insertion cell 470 ti. Spores GO X 5 ;i. Inner appendage 

 consisting of a basal cell which gives rise laterally to a single small antheridium on a very short stalk-cell, 

 and a hyaline terminal branch of five or six cells each bearing an upcurved branch; the branches producing 

 upcurved branchlets, the lowest of which is distinguished by a blackened septum. 



On the inferior surface of the prothorax of Brachinus lateralis Dej., Oaxaca, Mexico, British Museum 

 No. 721. 



The single type of this variety which has been examined, approaches var. pendula in the form of its 

 perithecium, but differs both in the form of its appendages and in their relation to the receptacle, through 

 the modification of cells IV and V. 



Var. incurvata Thaxter. Plate LXIII, fig. 4. 

 Proc. Am. Acad. Arts and Sci., Vol. XXXVIII, p. 55. June, 1902. 



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 

 five- to six-celled branch, recurved, and bearing branchlets of the characteristic 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 producing a well-developed similar branchlet from its concave side. 

 Perithecium 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. 092. 



While the appendages of this variety are not unlike those of the var. pendula, it differs in the form 

 of the perithecium, with its abruptly inbent tip, and in the differentiation of the receptacle into a stalk-part, 

 consisting of cells I and II, which is very abruptly distinguished from the subtriangular distal part: cells 

 IV and V lying almost horizontally, instead of vertically. 



