330 



NATURAL HISTORY OF ARTHRUPODS. 



Fig. 3G5. — IJesmoctms 

 palliatus. 



Differiiitf from the foregoing genera in having simple mandibles witliout fringes is 

 the semis Di'smocenm. ZK palliatini is found about elder (Sarnbucus) when it is in 

 blossom. This beetle is about 0.8 of an inch long, of a deej) 

 Frussian-lilue color, except the anterior portion of the elytra, whicli 

 is orange yellow. It is one of the most brilliant of our longicorn 

 Coleoptera. Its larva bores in the jiith of the elder. The females 

 of D. anripeiudg, a species found on the Pacific coast, are dimor- 

 phic, the two forms being distinguished liy different size of mark- 

 ings and by different fineness of punetation. 



Passing uow to genera of tiie suli-family Cerambycinffi that 

 have the base of the antenna' jiartly surrounded by the ey^es, 

 Clytus and related genera have long legs, finely granulated eyes, 

 a rounded or broadly triangular seutellum, tibia- not carinated 

 and with large spurs, prothorax never s]iiny or tuberculated, 

 elytra not sinuate, and iutercoxal process ai-ute. The si>ecies 

 are generally banded with yellow, «lnte, or black, and are 

 active both at flight and in running. < '/i/fim in its limited 

 sense, as defined by Drs. Le Conte and Horn, is confined in 

 North America to two species, of which the life histories are 

 unknown. (Jlj/tui wietis, a common yellow, lilack, and red 

 European species which is figured on page 328, is found in its 

 larval state in the dead wood of mulberry and sycamore trees, 

 and in the living wood of some other trees. ('. sexguttatus, 

 also figured, is from Algiers. 



CyUe)tc differs from Cli/tus in having the head ]iroportionally 

 smaller, the front short, the intercoxal jirocess rounded, and the 

 pronotnm hollowed out at the :<ides of its l>ase. Cijllene rohinim 

 is very abumlant upon locust trees, the wood of which is seri- 

 ously damaged 1)v its larvae The beetle is brownish black, figured beneath and trans- 

 versely striped aliove with yellow, and has reddish legs. Almost all the figuration is 

 produced by a coating of hnir-like scales, the beetle being mostly black 

 when these scales are I'emoved. This beetle is quite common in autumn 

 u|ion the blossoms of golden-rod {Solidago), the pollen of which it eats. 

 In September the beetles may be seen, often in considerable number, 

 rnnnino- over the bark on the trunks of locust trees, copulating and 

 ovi])ositin2. The egas are white, and are laid in crevices of the bark, 

 five or six in a place. They hatch in a short time and the young larva- 

 cat a slight distance beneath the Ijnrk bef(n-e ■« inter comes on. The next 

 s]iring they burrow about in the wood, throwing their refuse out of holes which they 

 have made in the Viark. Pujiation takes place the latter jiart of July, and the beetles 

 emerge in August and September; the entire metamorphosis of this species thus lasts 

 only one year. Ci/llote picius is so nearly like C. robiiini; that it has been confounded 

 with it, oftentimes by good observers. C. 2'>ictus lives as larva, however, in hickory 

 (Carya), the imago ai)pears in .June, .nnd it has slenderer ami shorter anteninv than 

 are those of C. robinicf?. 



Playionotus speciosiis has a form and style of marking similar to C. robinia', but 

 is larger and does not have the pronotum hollowed out at the sides. Its colors are 

 deep black, and yellow. The beetle is found in .July, when it lays its eggs in the 



Fig. ZIX.— Clytus sex- 

 guttatus. 



Fir.. 



(■;//- 



(enc rohiniw. 



