NORTH AMERICAN BOSTRICHIDAE 121 



sternite transversely depressed and deeply, arcuately emarginate on 

 each side of a median, bifid lobe, and the lateral margins of the elytra 

 tuberculate on the underside near the apices, with the tubercles fitting 

 into the emarginations on the last visible abdominal sternite. 



Length 3-5 mm., width 1.2-1.5 mm. 



Type locality. — Of torquata, "America meriodionali" ; of tridens, 

 St. Thomas Island, West Indies ; types in the Copenhagen Museum. 

 Of -floridana, Florida ; type in the Horn Collection in the Academy of 

 Natural Sciences of Philadelphia. 



Distribution. — From material examined: 



Florida: Biscayne, May 5; Key West, April; Lake Worth (Hubbard and 



Schwarz, and F. Knab). Marathron, March 7-8, 1919 (E. A. Schwarz). 



Paradise Key, February 5 to March 3 (H. S. Barber and T. E. Snyder). 

 Texas: Laredo, October 20, 190S (Mitchell and Bishopp). Brownsville, May 



(H. S. Barber, F. C. Craighead, Jones and Pratt, and C. Schaeffer). 

 Mexico: Cordoba, March 20 to May 17 (F. Knab). 

 West Indies : St. Croix, Tortola, Puerto Rico, Antigua, Jamaica, St. John, Mont- 



serrat, Eleuthera, Dominican Republic, Martinique, and Mona Island. 



Hosts. — This species has been reared from horsebean (Parhinsonia 

 aculeata, royal poinciana (Poinciana sp.), huisache (Acacia farnesi- 

 ana), and dead tamarind (T amarindus sp.). 



Fabricius (1792) described tridens from St. Thomas Island and in 

 (1801) described torquata from America meridionali. Lesne (1901) 

 on first information given to him on the type of Apate tridens Fabri- 

 cius (1792) associated it with Tetrapriocera, Jongicornis Olivier 

 (1795), but the material before him proved to be the male of Apate 

 torquata Fabricius (1801). which was originally described from a 

 female specimen, upon which he erected his new genus XyJomeira. 

 Dr. Henrikson, of Copenhagen, at the request of Dr. Lesne. reex- 

 amined the type of tridens and reported that the characters of the 

 anterior part of the type were that of the male of Xylomeira torquata, 

 while those of the posterior part resembled those of Tetrapriocera 

 Jongicornis. Owing to this condition, Lesne thought it advisable to 

 abandon the name tridens for torquata. although the former had 9 

 years* priority. 



Horn (1885) described foridanum from a single female specimen, 

 but Belkin (1910) placed it as a synonym of torquata Fabricius. 



Genus XYLOBIOPS Casey 



XyloMops Casey, 1898, N. Y. Ent. Soc. Jour. 6: 66, 67; Lesne, 1901, Soc. Ent. de 

 France Ann. (1900) 69: 476, 505-514, figs. 296-300; 1938, in Junk (pub.), 

 Coleopt. Cat., pt. 161, p. 60. 



Head deeply inserted in prothorax, not visible from above; elypeus 

 strongly transverse, truncate in front, with a distinct tooth on each 

 side at' base of labrum ; labrum small, vaguely emarginate or sub- 

 truncate and densely ciliate with long, yellow hairs in front ; mandibles 

 attenuate toward apices; eyes oval, globose, strongly projecting. 

 Antenna 10-segmented ; first and second segments robust, first long, 

 arcuate, second one-third as long as first; third to seventh segments 

 short, compact, transverse except sometimes the third, united shorter 

 than first segment; last three segments forming a large, loose, com- 

 pressed club, each with two more or less distinct sensory depressions 

 on each surface, the eight subtriangular, ninth oblong, and tenth nar- 

 rowly elongate, longer than ninth. Pronotum strongly convex, arcu- 



