312 



MONOGRAPH OF TIIE L ABOULBENIACE.E. 



This species, although occurring on such a variety of hosts, is very constant in its essential 

 characters, and appears to be undoubtedly distinct from L. flagellata and its near allies. Its 

 general color, the shape of its perithecium, the olive coloration at the base of its outer appendage, 

 and the blackened external branch of the latter, serve to distinguish it readily. It is allied to L. 

 flagellata and L. Pterostichi, and as already mentioned, may eventually prove to be the form 

 intended by Robin as the type of his L. Iiougetii, although the data available for distinguishing 

 this species would hardly lead one to unite the two. The specimens examined are from Greece 

 and Central Europe. 



Laboulbenia elongata Thaxter. Plate I, figs. 32-39 ; Plate II, figs. 5, 7, 8, 13-18 ; Plate 



XVI, figs. 1-14. 



Proc. Am. Acad. Arts and Sci. Vol. XXIV, p. 10 ; L. gigantea Istvauffi, Termiisz. Fiiset. Vol. XVIII, 1895, p. 82, Plate II. 



Perithecium nearly colorless or straw yellow to almost black-brown, blackened below the apex, 

 hyaline about the pore, more or less evenly inflated, the rather small lip-cells turned slightly 

 outward. Appendages very variable in form, size, and color ; hyaline or yellowish to deep red 

 brown, arising from an inner and an outer basal cell ; the outer bearing a single branch, rarely 

 simple, usually once or twice branched ; the inner producing two branches on either side, rarely 

 simple, often many times successively branched forming a dense tuft; the branches rigid and 

 distally attenuated, or flexuous, with bluntly rounded tips, slender or stout, rather closely septate. 

 Antheridia solitary, or borne in pairs laterally or terminally, on sometimes densely crowded 

 branchlets. Receptacle short and rather stout, or very elongate ; normal in form, hyaline or dis- 

 tally suffused with brown. Spores, 60-100 X 5-8 yu.. Perithecia, 110-240 x 35-95 \x. Longest 

 appendages, 180-750 fi. Total length to tip of perithecium, 300-^00 //, (1200^ sec. Istv&nffi). 



On Platynus cincticollis Say, P. extensicollis Say, P. melanarius Dej., P. ruficornis Lee, P. 

 picticornis Newm., P. bicolor Lee, P. Pusillus Lee, P. dissectus Lee, P. brunneomarginatus 

 Mann., P. floridanus Lee, P. ovipennis Mann., P. sinuatus Dej., Anisodactylus baltimorensis 

 Say, Maine to Florida and California. On Colpodes purpuripennis Chaud., C. coeruleomarginatus 

 Chaud., C. duplex Bates, C. grata Bates, C. petilus But., C. incultus Bates, C. sphodroides 

 Chaud., O. cyanonotus Chaud., C. tenuicornis Chaud., Mexico and Central America. On 

 Platynus (?) sp., Japan. On Limosthenes (Prist onychus) cavicola Sch., Platynus ruficornis 

 Goeze, Europe. On Macrochilus biguttatus Goeze, Liberia, Africa. 



In this species I have included a large series of specimens from various parts of the world 

 which, though varying very greatly in form and size, appear to be identical, since every imaginable 

 gradation exists between the more extreme types. The figures of L. flagellata, given by Pey- 

 ritsch, which it most nearly resembles, are so bad that, without a knowledge of the host, it would 

 be impossible to determine the species with any certainty. His fig. 2, for example, if correctly 

 drawn, would belong to a quite different type, and his fig. 6 is undoubtedly the young condition 

 of very different and undescribed form. It may be noted further that although Bembidia occur 

 abundantly associated with the species of Platynus, on which the present species is parasitic, I 

 have never found a specimen on the former host. Whether it should not be united with L. 

 anceps is another question which only the examination of European material can determine, as 



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