MELANDRYIDAE. 251 



Maxillary palpi with the 4th joint wider than the 2d and 3d ; 

 Eyes entire or nearly so ; 

 Last joint of maxillary palpi triangular, securiform; 



Middle coxae contiguous. Xylita. 



Middle coxse separate ; 



Pubescence erect; antennae not very thick. Zilora. 



Pubescence prostrate ; antennae thick, outer joints transverse. 



Carebara. 



Last joint of maxillary palpi very long, cultriform. Spilotps. 



Eyes strongly emarginate, last joint of palpi securiform. Trotomma. 



All of these genera occur in the Atlantic States ; Serropalpus, 

 Hypulus, and Xylita have also occurred in Oregon. To Phlceo- 

 trya I would refer Bircsea sericea Hald. Carebara is established 

 on a slender species with thick antenna? ; it is remarkable for 

 the tibial spurs being almost obsolete. The species C. longula 

 Lee. is narrow and flattened, dark brown, finely punctured and 

 pubescent, somewhat shining (25 unc. long) ; the thorax is 

 nearly square, not narrowed in front, and scarcely rounded on 

 the sides ; the abdomen projects a little beyond the elytra ; the 

 base of the antenna?, the feet, and sometimes the ventral surface, 

 are testaceous. The type of Spilotus is Hallomenus quadripus- 

 tulosus Mels. ; it appears to be related to the European Abdera, 

 but differs in the form of the last joint of the maxillary palpi. To 

 Trotoma belong Scraptia flavicollis Hald., and S. rugosa Hald. 



Group V. — Melandryae. 



Head inclined, never vertical, frontal suture distinct ; antenna? 

 with the third joint not conspicuously elongated ; maxillary palpi 

 long, sometimes moderately serriform, last joint wider, securiform ; 

 anterior coxse conical, contiguous, with distinct trochantin ; mid- 

 dle coxa? absolutely contiguous ; tibial spurs slender, never small ; 

 tarsi with penultimate joint more or less lobed ; claws simple. 



Our genera are four in number: — 



Thorax with the base sinuous, but not distinctly lobed ; 



Elytra not striate. Prothalpia. 



Elytra striate. Melandrya. 



Thorax with a broad basal lobe ; elytra punctured, not at all striate ; 



2dand 3d joints of antennae together not longer than the 4th. Emmesa. 



3d joint of antennae scarcely shorter than the 4th. Phryganophilus. 



Melandrya is represented by 31. striata Say, Emmesa by E. 

 connectens Newm. (Melandrya maculata Lee), and E. labiata 

 (M. labiata Say), all from the Atlantic States; Phrijcjanophilun 



