Mary Vincent 305 
A comparison of the different species belonging to the genus Pyxinia is 
given below. 
Pyxinia rubecula Hammerschmidt. 
Sporonts solitary obese. 
Measurements not given. 
Ratio length of protomerite : total tength : : 1 : 3-6. 
,, width protomerite : width deutomerite : : 1 : 1-2. 
Protomerite large regularly conoidal, a little longer than wide, constriction at septum. 
Deutomerite conical widest at shoulder, tapering to a slender pointed extremity. 
Nucleus ellipsoidal. 
Epimerite situated upon a short neck, urn-shaped, wide mouthed, crenulate on the 
periphery, with a short, stout conical style projecting upward through the centre. 
Cysts spherical 250-280/jl in diameter. 
Spores bluntly biconical 14p, by ly,. 
Hosts: Dermestes lardarius L. larva and D. vulpinus Fabr. adult. 
Pyxinia crystalligera Frenzel. 
Sporonts solitary elongate. 
Maximum length 750^x. Width not given. 
Ratio length protomerite : total length : : 1 : 5 to 1 : 10. 
„ width protomerite : width deutomerite : : 11 : 1. 
Protomerite spherical in adults. 
Deutomerite of adults regularly cylindrical, tapering in posterior third to a long, slender, 
bluntly pointed extremity. 
Epimerite a short sharp rigid style resting upon a small crenulate corona, the whole 
superimposed upon the cone-shaped protomerite of the cephalont. 
Nucleus irregularly ellipsoidal, containing several karyosomes. 
Cysts and spores not known. 
Hosts: Dermestes vulpinus Fabr. and D. peruvianus Casteln. adults and larvae of both. 
Pyxinia frenzeli Laveran and Mesnil. 
Sporonts solitary obese. 
Length 200yu. 
Maximum length of cephalonts 150 /jl. Maximum width 40/z. Cephalonts only illus¬ 
trated. 
Ratio length protomerite : total length : : 1 : 4. 
„ width protomerite : width deutomerite : : 1 : 2. 
Protomerite (of cephalonts) cylindrical to subglobose, constricted at septum. 
Deutomerite subglobose, nearly as wide as long. 
Epimerite in two parts, a slender cylindrical base equal in length to the protomerite, 
and superimposed upon same, and a short, sharp, apical style equal in length to the 
cylinder. 
Nucleus spherical, containing a large karyosome. 
Cysts? 1 
Spores 14 by G/jl 2 . 
Host: Altagenus pellio larva. 
Pyxinia mdbuszi Leger and Duboscq. 
Sporonts solitary. 
Length 100-140^u,. Width not given. 
1 Laveran and Mesnil (1900) give no dimensions for the cysts, but Leger and Duboscq (1902) 
quote diameter of 50/x. 
2 Leger and Duboscq (1902) state that the sporocysts of this species found by them were only 
8-5^ in length. 
