122 ORDER COLEOFTERA. 



Saprrda tridf.nta. ( Plate xxvi, fig. 6.) 



Antenna slender, shorter than the body, second longest. Color rnsty brown, approaching 

 to an olive : sutural line passing through the head and thorax. Insect ornamented 

 with pale brick-red stripes : face margined, and eyes surrounded with the colored 

 stripe referred to. Stripes nearly unite between the antennfe : from thence fhey 

 diverge abruptly, and form lateral stripes upon the thorax ; thence they proceed to 

 the prominent or angular shoulders, run down upon the sides of the elytra, and meet 

 the outer angle of the apex, and then puss round on the inside a short distance upon 

 the sutural line. These stripes send off three diverging ones : the fir^t is arched ; the 

 second or middle is straight, but passes obliquely downwards near the suture ; the 

 last, or apical one is short, and arched. The sides of the thorax are marked by four 

 oval spots. The two spots on the top of the thorax are obscure ; but in some species 

 there seem to be four, though the two near the head may be produced by loss of the 

 drab-colored nap. Beneath hoary, the whitish nap covering a black ground. Extremity 

 of the abdomen truncate. Outer angle of the elytra rounded. 



Saperda . 



Color yellowish drab, uniform : head, thorax and elytra covered with a close-pressed 

 short nap. Thorax longitudinally marked with pale yellow stripes alternating with 

 deeper. Elytra punctured, and marked with about seven obscure yellowish spots on 

 each. 



Saperda (Oberea) tripunctata. Raspberry Saperda. (Plate xvi, fig. 7.) 



'Color black : breast and top of the thorax rusty yellow. There are usually two elevated 



black dots on the middle of the thorax, and a third on the hinder edge. Antennae of 



a moderate length, and scarcely taper. Wing-covers coarsely punctured : punctures 



in rows on the top, but irregular on the sides and tips. Length from three-tenths to 



half an inch' ( Harris). There is also a black spot on the sides of the thorax. 



Dr. Harris observes that this insect completes its transformations near the end of July, 



and lays its eggs early in August on the stems of the blackberry or raspberry. The grubs 



burrow into the pith of the stem, and destroy it by the end of summer. 



The grubs are cylindrical in the middle, and thickened at each end. The first three rings 

 are short, and each is provided beneath with imperfect legs in the form of minute pointed 

 warts : the rest of the rings are sm<x>th. 



Gends MONOCIIAMUS. 

 Elytra somewhat parallel ; antennae glabrous ; anterior male tarsi hairy ; forelegs longest ; 

 thorax laterally spincd*. 



* Kkbt, in his generic characters in the Fauna Boreali , says tliis genua hai eleven joints in the antenn». I beliere 

 Hhas only ten, and the last joint is the longpst, or equal to the second. 



