AMERICAN COLEOPTERA. 75 



DICLIDIA Lee. 



Scutellum rounded, triangular; last dorsal segment not prolonged, 

 sixth ventral visible ; hind tibia slender, without ridges ; fourth joint 

 of anterior and middle tarsi emarginate, not smaller than the third ; 

 claws dilated at base ; hind femora small ; mesosternum compressed, 

 much elevated ; eyes coarsely granulated with a small emargination ; 

 antennae long and slender, slightly thickened externally, not serrate ; 

 third and fourth joints each equal to the first and second together ; 

 fifth and sixth a little shorter. 



In the £ the fifth ventral segment is broadly emarginate, and from 

 the tip of the abdomen proceed two long triangular appendages truncate 

 at apex. The sculpture consists of fine transverse lines. 



Differs from Pentaria by the form of the antennae, (see PI. I, fig. 1, 

 Diclidia, and fig. G, Pentaria), by the form of the mesosternum, and 

 by the external sexual characters ; the maxillary palpi, posterior tibia 

 and tarsi, and anterior tarsi are figured PI. I, figs. 1 — 4 inclusive. 



The only species known is 



D. lietlila Lee. (Anaspit), Pr. Ac. 1858, p. 76. (PL I, fig. 5).— Yellow;' scu- 

 tellar cloud, and two posterior bands of elytra black; venter fuscous. 3 mm. 

 Texas, Ohio. 



Seems to be not uncommon in Texas, and will probably be found 

 elsewhere in the southwest. The specimens vary in the distinctness 

 of the black markings, which are sometimes barely discernable ; the 

 width of the bands varies somewhat but the position and length are 

 always the same. 



PENTARIA Mills. 



Like Diclidia, except that the mesosternum is not compressed and 

 elevated; antennae with the joints 4 — (! short, 7 — 11 thickened, not 

 serrate ; last joint of the maxillary palpi triangular, acute at tip. 



The species are small, narrow, and finely pubescent; the sculpture as 

 in Diclidia consists of very fine transverse lines. The species except 

 trifasciata are western, and even that species is exceedingly rare; so 

 rare (hat none of the eastern collectors with whom I am acquainted, nor 

 I myself have taken it. 



This as well as Diclidia seems to lead from some of the Melandryidir 

 to the true Mordella, being related to both, but most closely to Anaspis, 

 and therefore properly placed in this family. 



No external sexual characters have been hitherto discovered. The 

 mouth parts and feet are shown PI. I, figs. 6 — 9. 



