144 



BULLETIN 54, UNITED STATES NATIONAL MUSEUM. 



head of the male. The basal joints of the first antennae of the female 

 are large and dilated, but without the prominent spine character- 

 istic of the male. 



The first thoracic segment in the male is ornamented 

 with two small tubercles situated close together on 

 the anterior portion. These tubercles are wanting 

 in the female. The posterior segments of the thorax 

 and the abdominal segments are densely tubercular. 



The terminal segment of the 

 body is pointed posteriorly, and 

 fringed with hairs. The uropoda 

 are about as long as the terminal 



FIG. 1-24.EXOCOKALI.ANA 

 8EXTICORNIS. O, MAX- 



ILLIPED. x 39. ft, MAN- 

 DIBLE. X 39. 



FIG. 125. EXOCORALLANA 

 SEXTICORNIS. HEAD AND 

 FIRST THORACIC SEG- 

 MENT. 



FIG. 126. EXOCORALLANA 

 SEXTICORNIS. MANDI- 

 BLE, x 51|. 



segment, the outer branch narrow, the inner branch wide; both are 

 fringed with hairs and armed with a few spines. 



One male and a number of females were collected by Henry Hemp- 

 hill at Key West, Florida. 



Type. Cut. No. 13540, U.S.N.M. 



EXOCORALLANA QUADRICORNIS (Hansen). 



Corallana quadricornis HANSEN, Vidensk. Selsk. Skr. (6), V, 1890, p. 382, pi. 

 vn, fig. 3. RICHARDSON, Proc. U. S. Nat. Mus., XXIII, 1901, p. 518; Trans. 

 Conn. Acad. Sci., XI, 1902, 290. 



Localities. St. Thomas, West Indies; Bermudas, at the Flatts; at 

 Long Bird Island in the cavities of a massive, black keratose sponge, 



living on the grassy sand flats at low tide; 

 Castle Harbor, in the same sponge. 



This species is very similar to E. tricor- 

 ;m-, but differs in the following important 

 characters: The clypeus, seen from below, 

 is very narrow and concealed for the mosi 

 part; the labrum is concealed by the man- 

 dibles. Half of the distal part of the 

 mandibles is very prominent and obscurely trifid. The last segment 

 of the abdomen is a little more impressed at the sides than in E. tricor- 

 nis. The abdomen is less hairy, the apical part of the last segment 

 less convex, ornamented, however, with four apical spines. 



FIG. 127. EXOCORALLANA QUADRI- 

 CORNIS (AFTER HANSEN). HEAD. 

 (ENLARGED.) 



