200 



3. Three Gregarines from Louisiana. 



By Max M. Ellis, University of Colorado. 



(With 2 figures.) 



eingeg. 14. April 1913. 



Through the kindness of Prof. E, Bethel of Denver, Colorado, the 

 ■writer recently received a collection of living beetles from New Orleans, 

 Louisiana. Three species of these beetles proved to be the hosts for 

 gregarines, of which two species seem to be new, and the other furnishes 

 a new record. 



Gregarinidae. 

 Gregarina grisea sp. nov. (Fig. 1.) 

 Type locality, New Orleans, Louisiana. March, 1913. 

 Host, Tenebrio castaneus Knoch., a Tenebrionid beetle. 



Average associations, 500 /< to 700 /<; smallest observed, 390 ^tt; 

 largest, 1055 /.i. 



Habitat, intestine, particularly the posterior third. 

 Primi te. Length of the protomerite 4,5 to 6,5 in the length of 

 the deutomerite; width of the protomerite 1,5 to 

 1,1 in the maximum width of the deutomerite; ma- 

 ximum Avidth of the deutomerite about 2, less fre- 

 quently 2,5 in the length of the deutomerite; proto- 

 merite rather hemispherical, the region of its maxi- 

 mum width being at or just in front of its junction 

 with the deutomerite ; deutomerite cylindrical, taper- 

 ing slightly if at all posteriorly, somewhat rounded 

 at its junction with the protomerite, posterior 

 margin broadly rounded; epicyte thick and uniform; 

 sarcocyte very clear and about twice as thick as the 

 epicyte; endocyte very dense, lead gray in color, 

 that of the protomerite being slightly granular; 

 nucleus not visible in the living animal, easily de- 

 monstrated with Iodine solution, its diameter about 

 equal to the length of the protomerite. 



Satellite. Rather narrowly joined to the 

 Primite, which it resembles; deutomerite tapering posteriorly so that it 

 is roughly conical; nucleus distinct, its diameter not quite equal to the 

 length of the protomerite, clear and without granules. 



Associations. All specimens seen were in association. The 

 measurements of four associations are given below. 



O 



Figure 1. Qregarina 



(jrisea Ellis. Length 



of the association, 



700 u. 



