THAXTER. 



— MONOGRAPH OF THE LABOULI5ENI A< I . I ■;. 



363 



Laboulbenia minima Thaxter. 

 The figures drawn from the material available at the time my Monograph was published, give but an 

 inadequate idea of the appearance of full grown specimens of this well marked and rather variable species, 

 additional material of which has been obtained from (he following sources; British Museum; No. 732 

 on Callida pulehripennis, no locality; No. 73(5 on C. onypterigioides, Volcan de Chiriqui, Panama; No. 

 551 on Callida sp., Mexico; No. 503 on Pionycha sp., Nanta, Amazon; No. 501 on Leptotrachelus sp. 

 Sao Paulo (V Brazil); No. 510 on Calophwna maculata Dej., Para, Brazil: Hope Collection; No, '21)1 on 

 Agra sp., South America: Paris Collection; No. G8-69 on Callida spp., Venezuela. All these forms, 

 though undoubtedly referable to this species, show a certain amount of variation, in coloration, in the 

 degree and conspicuousness of the punctation, which is sometimes very marked even on the perithecium; 

 in the conformation of the tip of the perithecium, which is sometimes flat topped and peculiarly modified, 

 and in the development of the appendages. The latter arise in crest-like series from the basal cells: one 

 such series from the outer, which may consist of seven or eight members which arise by successive prolifer- 

 ation from the inner angle of the basal cell and are variably branched and suffused; the inner basal cells 

 producing a somewhat similar series on either side. The general type is similar to that seen in L. longi- 

 collis which, although so very different in general appearance must be considered as not remotely related 

 to it. On species of Agra in the Hope Collection, and in the British Museum, specimens occur in which 

 the differences are so considerable that I think these forms may perhaps be specifically separated; but 

 I have preferred to defer any further account of them until I have an opportunity properly to illustrate 

 the present species, figures of which could not conveniently be included in the accompanying plates. 



Laboulbenia Brachini Thaxter. 



This species replaces L. Rougetii on American Bracluni, but although very similar in form and color, 

 differs distinctly in the centripetal proliferation of the basal cells of the appendages, in the black oblique 

 septa of their branches, and in the grouping of the antheridia. Simple forms of this species in which 

 there is no proliferation of the basal cells, are hardly distinguishable from some South African specimens 

 of L. Rougetii, and in one instance typical L. Brachini was obtained on a specimen in the British Museum 

 labeled "B. oblongus Dej. Tangier, Africa." That there is some error, either in my own, or in the Museum 

 label, I feel quite sure; since this is the only instance among the very large number of Eastern-Hemis- 

 phere Brachini which I have examined, in which a form like L. Brachini has been observed. L. Rougetii 

 var. Japanensis, with its dense stout appendages bears a superficial resemblance to this species, but there 

 is no doubt in my own mind as to the distinctness of the two. 



Additional material has been examined as follows. Paris Museum No. 67 on Brachinus sp., Vene- 

 zuela; Hope Collection No. 249 on Brachinus sp., Rio de Janeiro; No. 245 on B. fumans Fabr., North 

 America; No. 247 on B. geniculatus Dej., St. Thomas W. I., a curious hunched variety (?) with very 

 simple appendages: British Museum No. 720 on B. rhytiderus Chd., Oaxaca, Mexico; No. 719 on B. 

 elongatus Tourn. Mexico; No. 544 on B. geniculatus Dej., South America: Berlin Museum No. 990 on 

 B. Mexicanus Dej., Mexico; No. 991 on B. jusicornis Dej., Buenos Aires, Argentina; No. 992 on B. 

 genicularis Dej., Montivideo, Paraguay; No. 993 on B. nigrescens Chd., Brazil. 



Laboulbenia longicollis Thaxter. Plate LXIV, fig. 10. 

 Abundant material of this fine species has been obtained from various sources, and it seems to be 

 the only form which occurs on the numerous African species of Galerita; in marked contrast to the mul- 

 tiplication of species which has taken place on this host in the western hemisphere. Although in its general 

 appearance, large size and stalked perithecia, it recalls the condition seen in many of the American forms 

 on Galerita it does not appear to be at all closely related to the species of this well marked "Galeritae" 

 type, the series of appendages arising, not from cells successively separated above the basal cell, but from 

 the basal cell itself, which does not become divided during the process. The species shows no important 



