MOXOGKAril OF THE LABOULBENIAriM:, 353 
it cannot be by any possibility confused. The five types were found along the margins of the 
abdomen beyond the tips of the elytra. 
sec 
Laboulbenia Gcerinii Robin. Plate XXIJ, fig. 38. 
Robin Hist. Nat d. Veg. Par. p. 64, Plate X, fijs. 1-3; IVvrifsch Siix. d. Wien. Aca.l. Vo]. LXVIII, p 247; Rorokin, Veg. 
Paras. Vol. II, p. 413, Plate XXXIU, tig. 780; Wintor Die Pilzc TVntsrh. II, p '.»2I ; Hcrlr^io .^tulJ^i:llia, Vol. Ill, p. 
54; Saccardo SvUuge Fuijg. Vol. VIII, p. 910; Thaxtir, I'xoc. Am. Acad. Arts and Sri. \'ol. XX\'I1I. p. KG. 
Becoming more or less suffused will) smoky brown, rerilliecium becoming almost npnqnr, 
slightly inflated below, its upper half tapering evenly to the blunt nprx, t])o h'p-cells strnight, (he 
inner forming a slight prominence. Appendages rather numerous, not equalling the tip uf the 
pcrithccium, once or twice branched; the lower septa blackened, the intervening cells slightly 
inflated, tlie insertion-cell ap]»arcnny divided into several cells which are op-ujuc and indis- 
tinguishable, lioceptacle distally rather deeply suffused, (he basal and sub-bnsal cells hyaline or 
translucent, normal, except that celU IV and V mu) 
ondary cells. Pcrithceia, 110x55/1, Api»endagcs, 55 /x. Total IcngUi to tip of perithecium, 
300 fM. Robin's mr^asurements arc, 
430 /i; greatest breadth, 80 /i. 
On Gyretes sericeus Lnl»oulb., Caracas, Venezuela; on G, compreBSv^ I.cc. (=(r. shmnius L^c.) 
Texas and Illinois. 
The North American specimens of this species differ from Robin's account only in their 
somewhat shorter, stouter habit, which is doubtless due to the fact that they live on a smaller 
host. The original figures represent slight differences in the appendages, which may well be 
due to careless reproduction. In other respects the two forms correspond so closely that their 
identity seems very probable; although more abundant material of both is ranch to be desired. 
The species is closely allied to L. Orectogyri^iXA above mentioned, and together with the two pre- 
ceding and the following species forms a well-marked type within the genus. 
'-^0 
Tlie present species occurs, like L. G uerinii^ nXong the margins of the elytra of ita aquatic 
host- 
Laboulbenia Cyriniparum Tliaxter. Plate XXII, figs. 31-B7. 
Proc. Am. Acad. Arts and ScL Vol. XXVII, p. 39. 
Blackish brown, becomincr nearly or quite opaque. Perithecium large, sub-conical or sub- 
cylindrical, straight, the lip-cells nearly symmetrical, hyaline tipped, each producing a terminal, 
short, straight, tapering, finger-like, converging outgrowth; often wholly or partly aborted. 
Appendages hyaline or becoming brownish below, arising in a broad dense tuft from an opaque 
base, several times irregularly branched, rather closely septate below and constricted at the 
blackened, often oblique, septa, the cells between which arc more or less inflated, the ultimate 
branchlets slender, hyaline, sub-erect, rarely equalling the tip of the perithecium. Roce]>tacle 
distally A'cry broad, opaque, abruptly expanded above cell II, coll I usually curved and slender 
and sometimes elongate. Spores, 90x7-8 ft. Perithecia, 100x90/^. Appendages, longer. 
100-150 /i. Total length to tip of perithecium, average, 375 /i ; longer, 480 /i ; greatest breadth, 
IGOfx. 
23 
