12 1 ORDER COI.EOPTERA. 



Lamm . (Plate xxvi, fig. 9.) 



Color gray, and banded. Thorax spined at the sides : face marked with an impressed line, 



depressed between the antenna- ; antennae ten-jointed, first joint narrowed al base, 



second joinl slightly longest, the upper half of each very black, the lower half gray. 



Front of the thorax is marked by a black transverse line, in the rear of which there 



are two small black spots : posterior part of the thorax is punctured with black, 



especially the transverse groove. Elytra thicklj and coarsely punctured with black, 



and traversed by four belts, the two front ones incomplete : they are zigzag in form, 



and interrupted by gray spaces. Abdomen narrowed somewhat behind, and terminated 



b\ a black ovipositor. Femora thickened, and clavate at the tibial end, gray : tibia? 



marked by black rings ; tarsi black. Post-pectus deeply cmarginate and giay. 



The foregoing is a rare species in this vicinity. Its ovipositor shows that its eggs are 



deposited in wood, and hence it is an injurious insect to timber. Length, including the 



ovipositor, seven-eighths of an inch. 



Tetraopes tetiioi'iitiiai.ma (Forster). M. tcrnator ( Fab.). ( PI. v, tig. 11.) 



Color brick-red. Thorax marked with four black dots arranged in the form of a square. 



Elytra marked with four black dots; two near the basal angles, and two placed 



longitudinally upon the middle. Antenna? black : body beneath and legs black. 



This insect is common on the silkweed (Asclepias syriaca ) in June and July, and is 



extensively distributed, extending from Massachusetts to Carolina ( Hai.ukman's Mat. 



Hist. Long. Am. Phil. Soc. x, 53). It is a harmless insect in its mature state. 



Elai'hiimon villosum (Fab.). E. putator ( Peck). ( Plate xvi, fig. 8.) 



Color brown, gray or hoary from patches and stripes of grayish down : thorax more 

 villose than the elytra. Antenna? spinous : the second joint armed with a spine as 

 long, or in arlj as long as the third joint ; the spine of the third joint, one-third as 

 lonz as the fourth joint : on the fourth joint, the spine is shorter still. Elytra punc- 

 tured, and apex spined. Beneath, the same color as above : legs villous; hindlegs 

 armed with a short spine. 

 Although about a dozen species of this genus have been discovered in the United States, 

 the habits of this one only are known. The larva feeds upon the wood of whiteoak or 

 biackoak, and more rarelj of hickorj and che-nut : and on one occasion I reared a speci- 

 men, apparently of this species, from a Ian a taki n from the dead trunk of a small sprute 

 tree. The insect is half an inch or more in length, and may be distinguished by its chesnut 

 color, varied with yellowish spots of down ; the small spine upon some of the joints of the 

 antenns, and two upon the tip of each elytron ; and by the smooth raised medial line, 

 and tubercle, upon each side of the pronotum above. 



