478 PROCEEDINGS OF THE NATIONAL MUSEUM. vol.54. 



very short, broad and blunt, not reaching within their own length 

 of each other. Maxillae a little longer, two-jointed, cylindrical, the 

 first joint almost twice as thick as the second, and neither quite as 

 long as the mandibles. Antennae elongate, seven- jointed, flattened 

 foliaceous, with large sensory pits; first two joints simple, third to 

 sixth moderately elongate, each produced just before the attach- 

 ment of the succeeding joint into a broad flattened lamina not much 

 more than twice as long as the main stem; seventh joint also pro- 

 duced, laminate. Pronotum subquadrate, cut off at sides by head. 

 Mesonotum band-like, also included within the cavity of the head. 

 Elytra elongate, metanotum with praescutum elongate, convex at 

 base, sides roundingly approximate toward apex, where they almost 

 meet; scuti narrow, elongate, only a little longer than praescutum; 

 scutellum broad, quadrate, basally convex, apically bisinuate, not 

 much longer than postlumbium; postlumbium at least two-thirds as 

 long as wide; postscutellum long, broad; epimeron [femoralium] 

 reaching to middle of postscutellum. Wings with radial vein meet- 

 ing the costal margin beyond the middle, a small detached cloudy 

 vein behind the tip of the radius, medius strong, with a long an- 

 terior cloudy branch, cubitus missing; first anal merely a cloudy 

 vein, second anal strong, third anal missing. Tarsi three- jointed, 

 the first joint of different shape from the following; claws absent. 

 Oedeagus strongly bent, the under side being twice bent and the upper 

 thrice, the last bend being a very strong reflection at apical fourth; 

 apex very acute. 



The generic name is derived from Stenocranus (the host genus) 

 +<ptXo(; (loving), signifying a parasite of Stenocranus. 



Type of the genus. — StenocranopMlus quadratus Pierce. 



1. STENOCRANOPHILUS QUADRATUS Pierce. 



Stenocranophilus quadraius Piebce, 1914, Proc. Ent. Soc. Wash., vol. 16, 



pp. 127, 128. 



Described from one type and five paratype males bred by T. H. 

 Jones, October 19, 1912, from two females and four nymphal Steno- 

 cranus sacchari'vorus Westwood collected October 14 and 16, 1912, 

 from sugar cane at Eio Piedras, Porto Rico, and bearing the Porto 

 Rico Sugar Planter's Association accession number " 847-1912." 

 One paratype was returned to the association. The specific name is 

 intended to- draw attention to the quadrate form of the pronotum 

 and the scutellum. This form of scutellum has not heretofore been 

 found in the Halictophagidae. 



Male. — Length, 0.9 mm. : Aving expanse, 2 mm. Color golden brown. 

 A few points not given in the generic description remain to be noted. 

 The first tarsal joint is broad, apically broadest and somewhat acute 

 on outer angle; the point of attachment of the second is subapical at 



