342 



THAXTER. — MONOGRAPH OF THE LABOULBENIACEJE. 



Laboulbenia polyphaga Thaxter. 



This variable form, which in its typical condition, is readily distinguished, often appears to approach 

 so closely to L. flagellata and L. Pterostichi that, as I have mentioned in connection with these species, 

 I am uncertain whether it should be kept distinct. It is typically small straight and stiff in habit, and 

 rather slender; the outer appendage erect, or slightly divergent, and often quite simple, or usually but 

 once branched near its base; the basal cell of the inner appendage bearing two short branches producing 

 a rather compact group of incurved antheridia, which are not usually associated with any well developed 

 sterile branches. In this respect it is not unlike some forms of L. Anaplogenii, although the groups of 

 antheridia are never as dense as in this species, and cell IV of the receptacle never shows the same tendency 

 to proliferation and division. Though normally a short form, a few which seem otherwise indistinguish- 

 able, especially from South America, are greatly elongated and very slender, measuring more than 700 pL 

 in some cases; but such large individuals are, as a rule, readily distinguished from any of the ordinary 

 types of L. flagellata. Until I can thoroughly revise and illustrate this type of which a large amount of 

 new material has recently been obtained in South America, the forms below enumerated which have been 

 examined since the publication of my Monograph may be provisionally assigned to this species. 



British Museum: No. 614 on Pelmatellus variipes Bates, Pinchincha, Ecuador; No. 616 on Brady- 

 cellus puncticollis Coquer., Algeria; No. 681 on Nitobia cuprcola Bates, Irazu, Costa Rica; No. 659 on 

 Loxandrus unistigma Bates, Paso Antonio, Guatemala; No. 683 on Pelmatellus nitescens Bates, Vera 

 Paz, Guatemala; No. 624 on Argutor vernalis Fabr., Europe; No. 687 on Bradycellus circumdatus 

 Bates, Volcan de Chiriqui, Panama; No. 618 on Pangus sp., Venezuela; No. 627 on Platysma sp., 

 Pake Huron, North America; No. 723 on Stenognathus quadricollis Chaud., Mexico; No. 685 on 

 Pelmatellus vexator Bates, Totonicapam, Guatemala; No. 637 on T ropidopierus D uponcheli Sober, 

 Chile; No. 623 on Abacetus quadraticollis Thorn., Old Calabar; No. 724 on PhlceotJieratus quadricollis 

 Chd., Cordova, Mexico; No. 626 on Platyderus calarhoides Dej., Tangier; No. 625 on Argutor elonga- 

 tes Klg., Europe. Paris Museum: No. 197 on Mrogenidion Bedeli Tsch., Mon-Pin, China (?); No. 

 65 on harpaloid, Venezuela; No. 43 on Bradycellus Lusitanicus Dej., Lusitania; No. Ill on carabid, 

 Celebes; No. la, lb and No. 2, on Carabidae indet., Llanos de Venezuela; No. 64 on carabid indet., 

 Venezuela. Hope Collection: No. 325 on carabid indet., Amazon, and No. 341, Brazil. Berlin 

 Museum: No. 1031 on Antarctia concinna, Lima, Peru; No. 1169 on Lecanomerus obcsulus, Greymouth, 

 New Zealand. 



Laboulbenia Pterostichi Thaxter. 



Although the type material of this species, as it occurs for example on P. adoxus in New England, is 

 sufficiently well marked and easily distinguishable from the character of its appendages, the examination 

 of varied material, which I have provisionally included under L. flagellata and L. polyphaga, lead me to 

 believe that the present form might be more properly united with one or both of these species. Yet, as 

 I have remarked elsewhere, if all the forms which approach perhaps too closely to L. flagellata were to 

 be united under one "species," such a combination woidd become far too indefinite and comprehensive, 

 and would lead to still further combinations and an ever increasing specific chaos. The South American 

 forms that I have provisionally included here, show certain variation from the North American type, and 

 of forms from the Eastern Hemisphere I should include, somewhat doubtfully however, material on P. 

 sodalicus Heyd. from Turkestan and on Harpalus sp. ? from Japan. It is my purpose to give this species 

 a thorough revision in connection with its two nearest allies, as soon as I have an opportunity to study 

 the South American material which I have recently collected. In the interim this species is retained 

 provisionally, and in addition to the North American forms mentioned in my Monograph the following 

 South American ones may be provisionally added. On Pterolepta sp., British Museum No. 629; Hope 

 Collection; No. 336 on Orizabus calipilatus Columbia; No. 344 on Pterolepta sp. Columbia: Paris 

 Collection No. 148 on Pterolepta (Orizabus) sp. Columbia: Berlin Museum No. 931 on Physomerus 

 porosus, New Grenada. 



