The Genus Scaphoideus. 



187 



ARTICLE XX. — THE GENUS SCAPHOIDEUS* 



By Prof. Herbert Osborn, Ohio State University, Columbus. 



The genus Scaphoideus was founded by Uhler in 1889, and 

 made at that time to include the immistiis of Say, and the 

 newly described species intricatus :, jucundus ■, and consors. Du- 

 ring the same year Provancher described auro?iitens, and the 

 number has been further increased by descriptions by Van 

 Duzee and the writer. 



As material is in hand for the characterization of several 

 hew forms, it seems a suitable time to bring together a short 

 resume of the species heretofore described, and attempt a 

 synopsis that shall indicate the affinities in the group. Doubt- 

 less additional species will come to light, but it is believed 

 that a sufficient number are in hand to give a basis for a 

 natural grouping, and to indicate the character of the fauna 

 in the genus. 



The generic characters, as given by Uhler, are "Form of 

 Phlepsius lacerdae Sigt. Head triangular, flat above, vertex 

 almost as long as the width between the eyes, subacuminate 

 at tip, the base deeply sinuated ; front longer than wide, 

 deltoid, with the sides near the tip moderately curved, tylus 

 liguliform ; cheeks broad, curved, expanded to behind the 

 middle of the eye, acutely tapering at tip and hardly enclos- 

 ing the entire lora, the lora diagonal, acute at each end. 

 Antennae long and slender. Pronotum sublunate, more 

 curved anteriorly than sinuated posteriorly. Wing covers 

 moderately narrow, longer than the abdomen, curved, valvate, 

 the costal areole long, narrow, destitute of cross veins, fol- 

 lowed by a gradually widening cell, beyond this are four 

 apical cells of large size and mostly broad triangular figure ; 

 wings with the two apical middle areoles long and narrow, 

 narrowing at base towards the cross-vein. Abdomen moder- 

 ately long and narrow." 



As so defined the genus may include species which ap- 

 proach quite closely to Deltocephalus, or, as suggested by 



* Contributions from the Department of Zoology and Entomology of the Ohio 

 State University, under the direction of Prof. Herbert Osborn, No. 3. 



(Jour. Cin. Soc. Nat. Hist., Vol. XIX, No. 6.) 1 



Printed June 26, 1900. 



