May— July 1SS9.] 



PSYCHE. 



225 



and arrangement these organs present 

 excellent and distinctive specific char- 

 acters. 



Epicajita callosa Lee. — In a speci- 

 men from Montana, the labrum is 

 notched and on the epipharynx over the 

 region aronnd the bottom of the notch, 

 and from these to the base of the labrum 

 are scattered about 55 taste-cups ; and 

 also on either side of a median setose 

 ridge which passes back under the 

 clypeal region are about 10 cells, which 

 . may be taste-cups. 



Nemognatha lurida Lee. — In a 

 female from Montana a large triangular 

 area extending to and widening out on 

 the front edge of the epipharynx con- 

 tains about So remarkably small taste- 

 cups, not more than i to ^ as large as 

 those on the maxillae of the same beetle. 

 Unless these are gustatory it is difficult 

 to account for their presence here and 

 it will be observed that the taste-cups in 

 Epicauta ai'e unusually abundant. 



Eleodes obsoleta (Say) . — In this 

 tenebrionid from Montana, the epi- 

 pharynx is provided with a group of 

 from 15 to 20 taste-cups on each side in 

 the middle of a squarish area situated in 

 front of the middle, and whose sides are 

 densely setose. 



Diabrotica vittata (Fabr.). — In the 

 common striped squash beetle the lab- 

 rum is suddenly and deeply notched, 

 though there is no trace of a median 

 suture behind the notch. The epi- 

 pharynx has a singular armature. Just 

 within the bottom of the labral notch on 

 the under side is a row of four, broad, 

 conical setae, whose tips just reach the 



bottom of the notch. Along the front 

 edge on each side of the notch is a row 

 of most singular broad, flat, thin, leaf- 

 like setae which are closely appressed 

 to the broad, naked, epipharyngeal 

 margin. The surface of the epipharynx 

 is pilose, but the median region is 

 naked, and on the anterior half bears 

 from II to 12 taste-cups, arranged each 

 side of the median line in a rude Y. 

 On each side at the base of the labial 

 region are two sensory fields, each bear- 

 ing about 25 to 26 taste-cups. More 

 were seen under the clypeus. 



Leptura canadensis Fabr. — Front 

 edge of the labrum and epipharynx 

 densely fringed with slender, curved, 

 truncated setae. I can see numerous 

 taste-cups under the base of the labrum, 

 and what seems to be scattered taste- 

 cups in front, but the labrum is too 

 opaque for a clear view of them. 



Euryptera lateralis Oliv. — In a 

 specimen from Florida the epipharynx 

 is fringed with long, slender, truncate, 

 slightly cui-ved hairs projecting from the 

 front edge. Taste-cups are abundant 

 along and near the middle of the ante- 

 rior half of the labral region. 



Cyllene robiniae Forst. (or pictus 

 Dvury). — Labrum slightly excavated. 

 Epipharynx with a dense row of long, 

 slender, blunt rods, filling the sinus and 

 extending beyond the edge of the lab- 

 rum. An area on each side gives rise 

 to very long tactile hairs, between 

 which and the median field of taste- 

 cups is a pilose lateral area. The taste- 

 cups are more numerous than usual, 

 extending in an unbroken sensory field 



