TRANSACTIONS 



OF THE 



AMERICAN ENTOMOLOGICAL SOCIETY 



VOLIJN4K XXVII, 



COI^TRIBUTIOI^S TOWARD A IflOXOCiRAPH OF THE 

 NORTH AM ERICA 1¥ »fOCTlJID.«. 



REVISION OF THE SPECIES OF XYLINA Ochs. 

 BY JOHN B. SMITH, SC.D. 



The species of Xijlina are characterized by rather narrow, sub- 

 equal primaries, the costal and inner margins parallel, of nearly the 

 same length, the outer margin only a little oblique, sometimes 

 stumpy, often with a cut at the anal angle, the outer margin or 

 fringes a little dentate. In general habitus the species look de- 

 pressed or a little flattened, and when at rest the primaries are laid 

 flat over the abdomen, not sloping or rooflike. 



Head small, closely applied to the thorax, but not retracted ; 

 vestiture of front mixed with bristly hair so that it projects straight 

 forward, forming more or less evident, superimposed flat tufts. 

 There are no protuberances, plates or processes. Antennae moder- 

 ate in length, about two-thirds the length of the primaries, in the 

 female simple, or ciliated ; in the male ciliated or with lateral tufts 

 of hair or bristles, not serrated or pectinated in any case. Between 

 the antennae there is sometimes a brush of rough hair and scales. 

 Palpi short, reaching only the front in most cases, sometimes reach- 

 ing almost half way to the vertex. Terminal joint short and obtuse. 

 Tongue short, functional. Eyes naked, fringed with long, over- 

 hanging lashes. Thorax quadrate, small or quite moderate, de- 

 pressed, vestiture hairy, or with a mixture of scales and broad hair, 

 usually flattened down, but sometimes a little roughened. Collar a 



TRANS. AM. ENT. SOC. XXVII. (1) AUGUST, 1900. 



