486 ENTOMOLOGICAL NOTES, 



This species approaches very nearly to the genus Janus of 

 Stephens ; but there appears a httle confusion with our authors 

 as to the Hmits of the said genus, and indeed as to its charac- 

 ters. For instance, Stephens gives the Cephus femoratus of 

 Curtis as a species of Janus, whereas Curtis has clearly figured 

 that insect with subclavate antennas, while Janus hlfrons has 

 these organs filiform: Stephens says the mandibles are bi- 

 dentate ; Curtis figures them as tridentate ; and similar dis- 

 crepancies occur throughout. I have not the species called 

 femoratus to refer to ; but from what I see of the figure, I 

 cannot imagine it generically distinct from Cephus. In the 

 species Satyrus, Faunus, and one or two others, the antennee 

 are moderately short, of nearly uniform thickness throughout, 

 and composed of at least 27 joints, whilst in C. piigmwiis, 

 which appears to possess the typical habit of the genus, the 

 antennae are longer, subclavate, and have but 19 or 20 joints. 

 Janus connectens of Stephens has a somewhat diflferent habit 

 from any of the species of Cephus with which I am acquainted; 

 but it seemed to me that the division containing Faunus, &c. 

 is equally distinct, and therefore I would submit the propriety 

 of raising these also to the rank of a genus, under the name 

 Phyllwcus. 



Genus. — Oryssus, Latreille. 



Orys. terminalis. Niger, rugosus, abdotninis segmentis 3 tiltimis 

 rujis : antennarum articulis 4 et 5 extus, femora apice exttis, 

 tibiae basi extus nivea ; proalw ante apicem fascia transversi 

 lata fusca signatw. (Corp. long. "5 unc. ; alar, dilat. "775 

 unc.) 



Somewhat resembles 0. coronatus, a species inhabiting the south of 

 Europe, but differs in the detail of its colouring ; the head has a 

 crown of tubercles, is rugosely punctured, and entirely black : 

 the antennae (a character of the genus) are situated immediately 

 adjoining the mouth at the insertion of the mandibles, and appear 

 as if belonging to the instrumenta cibaria; they are black, with the 

 exception of the exterior portion of the fourth or fifth joints, 

 which is snowy white ; the extreme apex of each femur, and 

 about two-thirds of the exterior portion of each tibia?, is also 

 white : the three segments which terminate the abdomen are red. 

 Inhabits North America. Taken by Mr. Doubleday, at 



Trenton Falls. 



