402 



THAXTER. MONOGRAPH OF THE LABOULBENIACE^E. 



to tip of perithecium varying from 150 to 900 //or more) ; in color; in the development of the outer append- 

 age, which may be short and compact or elongate, consisting of only one or two cells or many celled; 

 and in the relation of the perithecium to the receptacle, to which it is variably united. 



Additional material has been examined as follows: British Museum No. 572 on Ozoena parallela 

 W., Rio Janeiro; No. 574 on Pachyteles sp., Ega, Amazon; No. 573 on Ozasna Rcichii Guer., Columbia; 

 No. 072 on Pachyteles Mexwanus Chaud., Toxpain, Mexico; No. 671 on P. scriatoporus Chaud., Bugaba, 

 Mexico. Hope Collection No. 281, on Goniotropis rufipcs Hope, New Grenada; No. 280 on P. Bnr.il- 

 iensis Gray, Brazil; No. 285 on Pachyteles sp., Brazil. In the Berlin Museum No. 945 on Ozoena Rcichii 

 Guer., New Grenada; No. 94G on 0. pedestris N, Bogota Columbia; No. 948 on O. glabra Klg., Brazil. 

 In U. S. National Museum No. 24 on P. Mcxicanus Chaud., Mexico (very typical specimens). 



Laboulbenia punctulata Thaxter. Plate LXIII, fig. 12. 

 Proc. Am. Acad. Arts and Sci., Vol. XXXV, p. 197. Dec, 1899. 



Perithecium about three fourths free, dark brown, translucent, curved toward the appendages which 

 cross it obliquely, the broad short flat-topped snout-like tip slightly upcurved. Receptacle short and 

 stout, the basal cell small, short, hyaline, contrasting, the rest concolorous with the perithecium, but 

 darker and distinctly punctate with dark brown spots. Outer appendage consisting of a series of from 

 three to about six successively smaller superposed cells, from each of which a simple tapering brown 

 branch arises, blackened about its subbasal septum, the successive branches superposed in a vertical 

 external row, the basal cell of the inner appendage producing usually a short one-celled antheridial branch 

 bearing a single small antheridium. Perithecia 120 X 45 fi. Total length to tip of perithecium 200- 

 220 //; to insertion-cell 125 /i. Appendages 100-120 /i. 



On Pachyteles parallchis Chaud., Brit. Mus. No. 575, Para: on P. porrcctus Chaud., Brit. Mus. 

 No. 670 (Biologia Coll.), Pantaleon, Guatemala. 



Although obtained from widely separated localities, this form, which occurs on the legs of its host, 

 is in both instances very constant in its characters, and quite unlike small short forms of L. Pachytelis 

 which are often found growing in a similar situation. Although its appendages are practically the same, 

 its peculiar short hunched form, the shape of its perithecium, and the coarse punctation of its receptacle 

 above the hyaline basal cell serve to distinguish it at once. 



Laboulbenia Darwinii Thaxter. Plate LV, fig. 2. 

 Proc. Am. Acad. Arts and Sci., Vol. XXXV, p. 170. Dec, 1899. 



Perithecium hyaline becoming pale straw- or amber-yellow, sometimes with a shade of brown, rela- 

 tively small, its upper third or less free from the receptacle, the tip black, abruptly distinguished, the broad 

 lip-edges translucent purplish brown. Receptacle relatively stout, indistinctly punctate with short lines 

 or dots of darker yellowish color, cells II, III, and IV often unusually broad. Insertion-cell well developed, 

 dee]) purplish brown or black. Outer appendage consisting of a short angular brownish basal cell, which 

 bears an outer and an inner branch distally, the outer simple or once branched above its basal cell, the 

 inner mostly simple; the outer branchlet mostly shorter, divergent, often deeply suffused with reddish 

 brown, the rest less deeply colored, rigid, erect. The inner appendage consisting of a smaller basal cell 

 which may produce a single branch, or two placed laterally or antero-posteriorly, short, simple with lateral 

 antheridia or once branched. Perithecia 100 X 30-35 /<. Total length to tip of perithecium 150-275 /*; 

 to insertion-cell 135-250 /i. Appendages, longest 200-250 /(. 



On Ozarna parallela YY., Brit. Mus. No. 572, Rio de Janeiro (legit C. Darwin); on O. lavis Klg., 

 same locality, Berlin Museum No. 947: on Pachyteles spp.; Paris Mus. No. 137, South America, Hope 

 Collection, Nos. 284 and 285, Brazil. Occurring usually at the base of the posterior legs or margins of 

 elytra. 



This species, which appears in general to be a well defined form, is perhaps the representative of the 

 flagellata-Yike type from which the other forms on Pachyteles and its allies have been derived. The only 



