142 PROCEEDINGS OF THE ACADEMY OF [Jan., 



Centrurus hentzi n. sp. 



This is similar in most points to the preceding species, and may be 

 but a variety of it, yet as the color differences are so constant I give it 

 a separate name. The legs are marm orate with blackish; on the 

 pedipalpi the tip of femur is blackish, the apical half of the tibia is 

 marked with black, and also the outer side of the hand. The tail is 

 marked with black below, leaving elongate pale spots, the basal joint 

 only slightly marked. The stripes on the dorsum are very broad, leav- 

 ing only a narrow white line between them. There is no median pale 

 spot on anterior margin, which is seen in C. carolinianus. 



Specimens from Runnymede, Oct., and Fort Reed. 

 Centrurus margaritatus Gervais. 



From Biscayue Bay, several specimens, mostly immature. 



Isometrus maculatus De Geer. 



Dr. Marx had this species from Key West. 

 Tityus floridanus n. sp. 



Dark red-brown; cephalothorax strongly granulate in fj-ont; an 

 interrupted median ridge on the abdomen, and each segment with a 

 curved middle row of granules each side, and the posterior margin 

 granulate. Last segment of abdomen with the submedian ridges reach- 

 ing nearly to base, the side ridges not half so far; below with four 

 ridges, the side ones the longer. Tail with ten ridges on the first seg- 

 ment, eight on two, three and four ; fifth segment with a median ridge 

 below, as also on the last; a few lateral granules on these segments. 

 Sting long and curved, the tooth beneath acute, but short. Pedipalpi 

 long and slender; the femur subparallel, angular, with six ridges, a 

 median one on inner side; tibia with two submedian ridges on inner 

 side, a basal granule larger than others; tibia but slightly swollen. 

 Hand swollen on base inside, not plainly angulate ; the fingers longer 

 than the hand. 



Length 70 mm. 



One male specimen from Key West. It has much resemblance to 

 Centrurus gracilis, but the palpi are more slender and the segments 

 of the tail are heavier. 

 Diplocentrus lesueurii Gervais. 



(Jne from Key West; the type was probably from Florida. 

 Opisthacanthus elatus Gervais. 



Dr. Marx distributed specimens as coming from Southern Florida. 



Order PHRYNIDA. 

 Admetus fuscimanus Koch. 



From Runnymede, Nov.; and Punta Gorda, Febr. and April. 



