472 PROCEEDINGS OF THE NATIONAL MUSEUM. vol.54. 



32. Genus NEOCHOLAX Pierce. 



1. N. jacohsoni Meijere; parasite of Ossoides lineatus Biermnn; 

 Java. 



33, Genus MUIRIXENOS, new genus. 



Named in honor of Frederick Muir, the collector of the species on 

 which this genus is founded, and of many other species in the author's 

 collection to be described later. Probably no collector has ever shown 

 a greater aptitude for collecting species of this order than Mr. Muir, 

 whose travels have taken him to many parts of the world. 



The genus is characterized by its elongate narrow body, arcuate 

 head, antennae with the last two joints attached far from the base 

 of the preceding (pi. 76, figs. 1, 2) ; prothorax band-like, trans- 

 verse above but laterally strongly diagonally flexed forward; meso- 

 thorax distinctly composed of three transverse pieces; metathorax 

 with praescutum reaching scutellum and almost twice as long, scuti 

 divided; eighth segment ventrally produced beneath ninth; wings 

 lacking cubitus and one anal vein, medius not broken. 



Type of the genus. — Muirixenos dicranotropidis Pierce, from Java. 



The genus is easily separable from the other Javan genera Neo- 

 chola^. and Cyrtocaraxenos by the characters given above and in 

 the table of genera. 



1. MUIRIXENOS DICRANOTROPIDIS, new species. 



Plate 76, fig. 1. 



Described from a male bred from Dicranotropis muiri Kirkaldy 

 collected in Java by F. Muir under the number 333. 



Length, 1 mm. Color, light broAvn. Head strongly arched. Pro- 

 thorax dorsally transverse but with pleurae diagonal, carrying the 

 dorsum far anterior to the sternum. Mesothorax with praescutum 

 semilunar, scutum transverse, and scutellum transverse. The meta- 

 thoracic parts are well illustrated in figure 1, plate 76, 



Type.— C^it. No. 21450, U,S,N.M. 



2. MUIRIXENOS PERKINSIELLAE, new species. 



Plate 76, figs. 2-5. 



Described from a male bred from Perkinsiella saccharicida Kir- 

 kaldy collected in Java by F. Muir under the number 316. 



Length slightly under 1 mm. Lighter in color, almost yellowish. 

 It differs very slightly from the preceding. The oedeagus, antenna, 

 tarsus, and side view of thorax are illustrated. 



The episternum reaches closer to the coxal cavity than in any other 

 species yet seen, but does not reach it. 



Type.— C^t. No. 21451, U.S.N.M. 



