THAXTER. 



- MONOGRAPH OF THE LABOULBENIACEiE. 



401 



the basal part and consisting of from one to three cells, hyaline or brown below, blunt-tipped; the basal 

 cell of the inner appendage giving rise to the characteristic scries of superposed ramiferous cells on either 

 side like that of the outer appendage bu1 nearly horizontal and extending inward well beyond the inner 

 end of the insertion-cell, the four to six lower cells of each scries producing, two, less often three, unicellular 

 branchlets terminated by brown long-necked antheridia; the sterile hranclilcts of the upper and distal 

 cells similar to those of t lit" outer appendage. Spores 45 X 4.5 /*. IYrithecia 180-290 X 40-48 /', the 

 stalk 55-125 X 25-35 ;i. Receptacle 1G5-220 p., Appendages, greatest total length, 105-185 ft. Total 

 length to tip of perithecium 350-725 fi. 



On Galerita sp. (tips of elytra), Venezuela; Paris Museum, No. 75. On tip of abdomen, inferior, 

 of Galerita Lecontei Dej. : British Museum, No. 521, Costa Rica; No. 525 on Trichognathus margini- 

 pennis Latr. Tamas, ? Columbia, No. 52(5 on T. marginatus Latr., Brazil. 



This fine species is distinguished from L. pygmaa especially, with which it was formerly in part 

 confused, by the insertion of its appendages, the insertion-cell being unmodified and small, and finally 

 continuous with the series of cells which form the primary inner appendages, the bases of which are in 

 contact with cell V of the receptacle, except the uppermost (innermost). 



Laboulbenia Pheropsophi Thaxter. Plate LXIV, figs. 8-9. 

 Since the original publication of this species, it has been possible to examine a considerable amount 

 of additional material occurring on species of Pheropsophus from both hemispheres. The material from 

 these sources is, in general, rather clearly distinguished, however; that from the western hemisphere 

 adhering closely to the type as originally described, in which the outer appendage is at most not more 

 than five or six times proliferous, that is the main axis consists of not more than five or six cells and is 

 of compact habit: the inner appendage producing, as a rule, only a single branch with two or three pro- 

 liferations, the axis thus only two- to three-celled; a small short stout solitary antheridium being borne 

 on a short stalk-cell at its base. Material from the Eastern Hemisphere, though often closely resembling 

 the type, especially in the African specimens, tends to vary to the condition shown in figure 8, the outer 

 appendage, as well as the two branches of the inner, being much more luxuriantly developed and the 

 antheridia (fig. 9) produced usually in groups of two or three, their form more slender and elongate, the 

 necks curved. This is especially true of specimens from Madagascar, Ceylon, the Philippines, and 

 localities to the east of Africa. The differences, however, are not sufficiently absolute to warrant even 

 a varietal designation. 



The additional material obtained is as follows: British Museum No. 534 on P. fuscicoUis Dej., Java; 

 No. 717 on P. wquinoctialis Linn., Yucatan; No. 718 on P. biplagiatus Chaud., Junquilla, Mexico: Paris 

 Museum; No. 8 on Pheropsophus sp., Madagascar, and No. 14, Ceylon; No. 55 on P. fuscicoUis Dej., 

 Asia; No. 50 on P. Latoni Dej., Asia; No. 70 on Pheropsophus sp., Venezuela; No. 77 on Pheropsophus 

 sp., Java: Berlin Museum; No. 995 on P. obliquatus, Kimpoko, Congo; No. 998 on P. Kersteni Gerst., 

 Aruscha Kisnani, Africa; No. 1001 on P. humeralis Chaud., Madagascar; No. 1003 on Pheropsophus 

 sp., Luzon, Philippines; No. 1005 on P. bipartitus, Madagascar. Hope Collection; No. 238 on Pherop- 

 sophus sp., Ceylon. 



Laboulbenia Pachytelis Thaxter. 

 This type proves to be a very variable one, in which species-making is going on in a fashion somewhat 

 similar to that which is seen in the forms occurring on the closely related Brachinus and Galerita. I have 

 separated as species three forms which are closely related in this group, L. punctulata from widely sepa- 

 rated localities, L. tortuosa on our small western Paclujtcles, and L. Ozocucc which has developed a very 

 characteristic method of bearing its antheridia. It is probable that a fourth species is represented in 

 material from the Amazon, as well as a fifth on Paclujtcles loncjicornis from Mexico; but I have been 

 unable to include figures of these forms which I hope to illustrate in a future paper. The variations 

 among the more typical forms are in general associated with extreme differences in size, (the total length 



