MELANDIIYIDAE. 397 



slightly prolonged; the middle coxtB are equally Peiiarated; the 

 hind coxiB are less distant; the tarsi are liliform, and tiie claw'^ 

 simple; the tibial spurs are long. 



Group III. — Melandryae. 



Head inclined, never vertical, frontal suture distinct; antennae 

 with the third joint not conspicuously elongated; maxillary palpi 

 long, sometimes moderately serriform, last joint wider, securil'orui ; 

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

 dle coxas absolutely contiguous; tibial spurs slender, never small; 

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



Our genera are four iu number: — 



Thorax witli tlie liase sinuous, but not distinctly lobed ; 



Elytra not striate. Prothalpia. 



Elytra striate. Melandrya. 



Thorax with a broad basal lobe ; elytra punctured, not at all striat<! ; 



2d and 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 M. striata Say, Emmesa by E. 

 connectens Xewm. {3Ielandr]ja macvlata Lee), and E. labiofn 

 (M. lahiata Say), all from the Atlantic States; Fhryganojjhiluti 

 collaris Lee. is found from jNIaine to Oregon. 



Group IV. — Serropalpi. 



Head more or less inclined, sometimes vertical; frontal suture 

 not distinct ; antennaj variable, third joint not conspicuously 

 elongated ; maxillary palj)i variable, sometimes very long, with 

 the third and fourth joints dilated internally, and the fourth 

 large and securiform (in which case they are called ser7"iform) ; 

 anterior cox?e conical, contiguous, without trochantin, except in 

 Xylita, where the trochantin is indistinct; middle coxfe not con- 

 tiguous, except in Amblyctis and Xylita; tibial spurs slender, 

 sometimes very small ; tarsi with penultimate joint sometimes 

 emarginate or lobed; claws simple. 



Our genera may be thus tabulated: — 



Middle coxie contiguous, 2. 



Middle coxae separated by niesosternum. 3. 



2. Antennfe strongly compressed ; 4th joint of maxillary palpi not larger 



than 3d. Amblyctis. 



Antenna; slender; 4tli joint of maxillary palpi large, securiform. 



Xylita. 



