92 KANSAS UNIVERSITY SCIENCE BULLETIN. 



THRYPTICUS. 



Gerstaecker, Stett. Ent. Zeit., 1866, 43. 



Wheeler, Psyche, 1890, 375 (Aplutntotimus) ; Proc. Cal. Acad. Sci., 1899. 



Aldrich, Trans. Lond. Entom. Soc, 1896, 339 (Xantholricha) ; Eat. News, 1900, 533. 



Thrypticus cupuliferus. 



Aldrich, loc. cit. (Xanthotrichd). 



Eight specimens. 



Thrypticus minor. 



Aldrich, loc. cit., 3i0 (Xanthotricha). 



Nine specimens. 



XANTHINA. 



New genus (Xanthos, yellow). 



• Similar to Xanthochlorus ; in the described species without 

 metallic color; bristles of legs brown, of body dark brown, al- 

 most black ; face very narrow in both sexes, eyes almost con- 

 tiguous in the male ; prescutellar depression very distinct. 

 Antenna? short, first joint minute, third rounded, hairy ; arista 

 with moderate pubescence, almost or completely apical ; acros- 

 tichal bristles in two rows. Hypopygium concealed, with two 

 hairy filaments nearly as long as the abdomen. Palpi and legs 

 hairy, hind tibiae especially so. Venation as in Chrysotus. 



Xanthina plumicauda, n. sp. (Plate IV, fig. 1). 



Male : Front and very narrow face, dorsum of abdomen ex- 

 cept the base, and a spot below the tegula, black ; elsewhere 

 yellow ; palpi decidedly large and hairy ; hind tibitie with two 

 rows of pale bristles on opposite sides toward the tip ; wings 

 hyaline. 



Female : Abdomen dark brown on the middle of the dorsum ; 

 hind tibise with ordinary but coarse hairs. 



Length, 1.4 to 2.6 mm. ; wing about the same. One male, 

 three females. 



THINOPHILUS. 



Wahlberg, Oefv. K. Vet. Akad., 1841, 37. 

 Wheeler, Ent. News, VII, 152-156, 1896. 



A single specimen of an undescribed species. As Professor 

 Wheeler is engaged on this genus, I prefer not to describe the 

 present species. 



