OF WASHINGTON. 99 



discovered in dead birch wood a larva which agreed perfectly 

 with the above. This larva, at the time of its coming into my 

 possession, was much shrivelled and fast drying up. My own 

 specimens having died, I placed this larva, by way of experi 

 ment, in the hollow cavity of a hickory twig pruned by Ela- 

 phidion. The Leptura thrived in this improvised home and 

 transformed to imago June 1 1 . The imago also occurs in July, 

 frequenting the flowers of chestnut. 



Cyrtinus pygmceus Hald. occurs rather commonly between 

 New York city and Washington on locust, hickory, and box- 

 elder {N eg undo negundo). On the last-mentioned tree nu 

 merous small holes were noticed in the terminal tw T igs on which 

 the imagos were resting or crawling, and which were without 

 doubt made by them in exit. Dr. J. B. Smith found this species 

 under similar circumstances on oak {Ent. Am., vi, 137), and 

 Mr. Schwarz has reared it from locust (Pr. Ent. Soc. Wash., 

 n, 73) ; hence I feel no hesitation in placing hickory and box- 

 elder on the list. About Washington the beetles have been 

 noticed during June and July. 



Acanthoderes quadrigibbus Say breeds in box-elder, all of 

 the galleries seen, in a large trunk, being in the main longitudinal 

 and situated immediately under or very near the bark. This 

 species was bred by LeConte from hickory, and, according to Mr. 

 Schwarz, attacks also oak, beech, and hackberry. It is parasitized 

 by a large Braconid, evidently Bracon, the empty cocoons only 

 having been found. 



Leptostylus parvus Lee. occurs near Washington, on box-elder 

 and tulip, having been beaten from dead branches, in about equal 

 numbers, in the latter part of June and first of July. 



Leptostylus biustus Lee. June 17 my attention was attracted 

 by a series of sharp, ticking sounds emanating from some jars of 

 twigs in my apartments. The sound continuing, it was traced 

 directly to its exact source on a twig, which, on removing the 

 bark, disclosed, much to my surprise, a longicorn pupa with 

 which I was unfamiliar. Subsequently other portions of the 

 twig were decorticated, resulting in the discovery, June 20, of 

 Leptostylus biustus in all its stages; the imago, however, had 

 not fully matured and could not have issued until two or three 

 days later. 



This ticking sound resembled in every particular that made by 

 Liopus cinereus Lee., which I had always, and correctly, 

 attributed to the larva. That such a sound can be also produced 

 by a pupa I do not remember to have ever seen recorded. To 

 me this is a subject of sufficient interest to invite further inquiry. 

 The larva of Liopus cinereus certainly produces this sound, as 



