636 PROCEEDINGS OF THE ACADEMY OF [Oct., 



enough to determine how many distinct species there are, and the 

 matter will be reserved for a future communication. 



For the following new species, the data at present on hand are not 

 sufficient to warrant formal definitions. 



Actinocephalus americanus n. sp. PI. XXX, fig. 22. 



This species is created for a single individual found in Galerita hicolor 

 Drury. The beetle is quite common and I have opened perhaps twenty 

 individuals, but only one was parasitized, and then but the one grega- 

 rine was present. It is probable that the parasite is only sporadically 

 present in Galerita, and that its usual host is some other animal. It 

 is, however, distinct from any of the common species occurring at Wyn- 

 cote. It is i^laced in the genus Adinocephalus on account of the form 

 of both protomerite and deutomerite, the presence of several karyo- 

 somes in the nucleus, and the fact that its host was a carnivorous 

 Arthropod. 



The gregarine was 200 microns long, 35 of wdiich represented the 

 length of the protomerite. The two segments were each about 45 

 microns broad. The epicyte was verj^ distinct and showed a little 

 papilla at the anterior tip of the protomerite. The septum curved 

 forward and the nucleus showed several karyosomes. The entocyte 

 was much denser in the deuteromite than in the protomerite. The 

 animal progressed cjuite freely in a circle of short radius, but was pre- 

 vented from taking any lengthy excursions Ijy the surrounding host 

 tissue. 



Hoplorhynchus scolopendras n. sp. PI. XXX, fig. 19. 



This species is created for a gregarine parasitic in Scolopendra woodi 

 Meinert, from Raleigh, N. C. Two specimens were present. One of 

 these, when first seen, was a balloon-shaped sac, 350 microns long by 

 200 broad. The epicyte and sarcocyte were each nearly or ciuite 3 

 microns thick, and the former was plainly marked with longitudinal 

 striations. Both of the individuals were very flexible, readily changing 

 shape and showing extensive contortions. 



After having been upon the slide for perhaps an hour, the parasites 

 became quiescent and assumed w^hat was probably something like the 

 typical shape. The larger then measured 825 microns long by 120 

 microns broad. The anterior end, as shown in fig. 19, was much 

 narrower than the balance of the animal, iDut it is somewhat question- 

 able if this narrowing be permanent. A distinct septum extended 

 across this narrower region, cutting off a portion of granular entocyte. 



