PROCEEDINGS OF THE NATIONAL MUSEUM 



cell division and also in two organisms with the macronuclei much 

 elongated, as in the stage shown in plate 2, figure 2. In the latter 

 the micronucleus was longer than usual, but no delicate spindle was 

 detected. The chromatin is in spherical granules. One dividing 

 organism similar to that shown in plate 2, figure 3, is almost separated 

 into daughter cells, and yet the isthmus connecting the daughter 

 macronuclei still remains. 



Type specimen. — U.S.N. M. no. 8586. 



Host. — Osmoderma scabra. 



Location. — Posterior intestine. 



Distribution. — Pennsylvania . 



Remarks. — The distinctive features about the species are the size 

 and shape of the nuclei and other organelles. The absence of the 

 caryophore in some specimens may be due to the preparation, or it 

 may suggest that it is an artifact. Grasse (1926) divides the genus 

 Nyctotherus into two groups, depending upon the presence or absence 

 of the caryophore. For those lacking this organelle he suggests the 

 new genus name Nyctotherides. 



Table 1. — Recorded species of Nyctotherus 



Species 



africanus Castellani 



a manieTisis Bezzenherger 



buissoni Pinto 



comatul.ae Claparede and Lach- 



mann. 

 cordifor mis Khrenberg 



cunhai Pinto 



duboisii Kiinstler 



faba Schaudinn 



giganteus Krause 



gyOTyanus Claparede and Lach- 



mann. 

 haematobius Claparede and Lach- 



mann. 



haranti Grasse 



kempt Ghosh 



macropharyngeus Bezzenherger 



magnus Bezzenherger _ 



muUispoTiferus Walker 



osmodermae Zeiiff.. 



malis Leidy 



papitlatu.s DohelL 



parous Walker 



pisckola Dobell 



reniformis Bhatia and Gulati. 



termitis Dohell 



tejerai Pinto 



tipulae Grass6 



travassosi Cunha and Pinto_. 



velox Leidy _ 



viannai Pinto 



sp. D'Udekem 



Homo sapiens 



Bufo sp 



Cockroach _ _ 



Comatula mediterranea. 



Rana temporaria, R. esculenta, Donbinator igneus, 

 Bufo cinereus, B. melanostidus . 



Hyla crospedospila 



Cetonia aurata (larvae), Oryctes mancornis 



Homo sapiens 



do 



Hydrophilus piceus 



Apus cancriformis, Lepidurus productus. 



Tarentota mauritanica 



A mpullaria globosa ._ 



Ranatigrina, R.cyanophlyctis, R. hexadactyla 



Rana hexadactyla 



Cavia cobaya 



Osmoderma scabra _ 



Blatta orientalis, B. germanica, GryUntalpa vul- 

 garis, Periplaneta americana. 

 Bufo melanostictus, Rana tigrina, Rhacophorus 

 maculatus. 



Rana clamata, R. palustris 



Rana tigrina, Piarect us brachypo mus 



Bufo macroiis 



Calotermes miliaris 



Bufo marinus 



Ctennphora elegans- - 



Olossnscolex wiengreeni 



Julus marginatus 



Batrachian 



Julus terrestris 



Location 



Intestine (C). 



Intestine. 



Intestine (C). 



Intestine and coe- 

 lomic fluid. 



Intestine and clo- 

 aca (C). 



Intestine. 



Intestine (C). 



Intestine. 

 Do. 

 Do. 



Branchial sacs. 



Intestine (C). 

 Rectum. 

 Cloaca. 

 Do. 

 Intestine. 

 Hind intestine. 

 Intestine (C). 



Rectum. 



Du. 

 Intestine (C;. 

 Rectum. 

 Intestine (C). 

 Intestine. 



Do. 



Do. 

 Intestine (C). 

 Intestine. 



Do. 



