'528 



EEPORT UNITED STATES GEOLOGICAL SURVEY. 



origin, and tbence goes straight to the outer edge, inclosing a triangular 

 space. The halteres pale flesh-colored. 



Abdomen blood-red, with slight sparse hairs. The segments on the 

 terminal half of the abdomen are edged with black, and the tip of 

 the abdomen is blackish, while the genital armature is iiesh-colored. 

 Length, .10 inch. 



This species differs decidedly from Diplosis pini Loew 2 , in that the 

 basal joints of the autennse are not yellow, but pale brown. The clypeus 

 (hypostoma) is reddish-brown, not reddish-yellow. The abdomen is 

 blood-red, and the hairs are too few to give a silvery reflection ; the 

 legs do not seem whiter beneath than above; the wings are not densely 

 pubescent, but are sparingly so. The cross vein is difficult to find, and 

 then is only seen in certain positions. It is smaller, being only a tenth 

 of an inch long. 



In its habits it seems to differ from Osten Sacken's J), pini inopis in 

 that the apparently similar pale, oval, resinous, pitchy cocoons are 

 placed on the buds of the pine-needles, which were somewhat deformed, 

 and could thus be easily distinguished from others not affected, as well 

 as by the resinous pitchy exudation covering them. (Observed May 20.) 

 The food-plant is also different, the D. pini inopis living on Finns inops, 

 Jersey or scrub pine, which does not extend so far north as New Eng- 

 land. 



The Pine Monohammus {M. confusor Kirby., Jf. titillaior Harris). — 



Nothing was known of the habits of this 

 borer by Harris, in the third editiop of 

 whose treatise the beetle is well figured. 

 In ISCO, Dr. Fitch gave an excellent account 

 of the habits and brief description of the 

 larva and pupa and adult in his Fourth 

 lieport ou the Noxious Insects of New 

 York. The following description of the 

 larva and pupa is 

 based on speci- 

 mens obtained at 

 Brunswick, Me., 

 and compared with 

 some received from 

 Mr. F. C. Bow- 

 ditch, who p u b- 

 lishedin the Amer- 

 ican Naturalist, 

 August, 1873 (vii, 

 p. 498), an account 

 of the habits and 

 transformations. 

 He sent me a block 

 of pine wood split 

 off, containing the 

 terminal portion of 

 the cell, stuffed 



Fig. 8.—Monohammus covfusor in its hole preparing to bore its way out of with large chipS, 

 thetree: «, dor.sal ;&, Literal view of larva, natural size; c, head of larva, seen „„ i"^ n nitP 



from beneath ; d, head seen from above, both enl.arged ; e, f, lateral and ven- an ilUgCU t] u i I tJ 

 tnl view of pupa, natural size. rcgulai'lv. In the 



museum of the Peabody Academy of Science, at Salem, is a piece of 

 planed plank, which had been sawn so as to uncover part of the hole, 

 with the beetle within, as seen in Fig. 8. Fitch states that this and 



