MONOGRAPH OF THE LABOULIiENTACE.E. 



345 



The five types of this singular species are all in poor condition, the appendages being, for 

 the most part, broken; yet it may be recognized without difficulty by the peculiar outgrowth 

 from one of its lip-cells, which distinguishes it from all other species with the exception of L. 

 Gyriuidarum, all the lip-cells of which are appendiculate in a somewhat similar fashion. It 

 appears to be peculiar to the single species of Bembidium mentioned, and was found in two 

 instances only on the margin of the right elytron near the base. The outgrowth in all the types 

 proceeds from one of the lip-cells on the right of the pore. The infested beetles were found 

 among material kindly collected for the writer by Miss A. M. Parker. 



Laboulbenia fumosa Thaxter. Plate XXII, figs. 9-20. 



Proc. Am. Acad. Arts and Sci. Vol. XXIV, p. 12; Saccardo Sylloge, Vol. IX, p. 1132. 



Smoky brown with a slight olive tinge. Perithecium becoming almost opaque, tapering 

 rather gradually to the somewhat blunt tip, the lip-cells turned slightly outward. Appendages 

 consisting of two basal cells, the outer followed by a roundish cell which, by successive pro- 

 liferation on its inner side, gives rise to a number of branches ; the first of which, originally 

 terminal, becomes lateral, curved outward, blackened below, and bears several erect, usually 

 simple branchlets. The inner basal cell produces on either side a number of branches, often 

 once or twice branched near the base, nearly straight, erect, tapering ; the whole forming a 

 dense tuft. Insertion-cell broad, a hyaline portion projecting up between the two basal cells. 

 Receptacle more or less tinged with brown, paler below, rather stout, never elongate, expand- 

 ing gradually from below upward. Spores, 55-60 X 5-5.5 ft. Perithecia, 120-130 X 50-75 fi. 

 Appendages, 75-100 p. Total length to tip of perithecium, 250-325 fx ; greatest width, 75- 

 100 im. 



On Platynus cincticollis Say, New England. 



This species is a common one always occurring at the tips of the elytra and extending to 

 the adjacent apex of the abdomen. It is very closely allied to L. luxurians, which, curiously 

 enough, grows in exactly the same position on species of Bembidium, but is distinguished by its 

 large size and straight appendages. The basal cell of its outer appendage bears a proliferous 

 cell, the first (originally terminal) branch of which becomes pushed outward by its successive 

 proliferation, and the blackened outer half of this branch from which two to four branchlets arise 

 vertically, is quite characteristic in appearance ; the branchlets, however, usually breaking off in 

 mature specimens. The next branch found within this primary branch may resemble it to some 

 extent, but is more often simple, like those which succeed it. The species grows densely 

 crowded, and I have never found it on other species of Platynus commonly associated with the 

 one mentioned, which occurs in very wet situations along brooks, where it hides under stones or 

 in wet rubbish. A species very similar to this occurs in the same situation on the elytra of 

 Anophthalmias tenuis Horn in Indiana ; but my material is hardly sufficient to form the basis of 

 a diagnosis. 



