OF WASHINGTON. 97 



The species is evidently parasitized by Bracon eurygaster 

 Brulle. 



Phyton pallidum Say is one of the species mentioned by Dr. 

 LeConte as having bred from hickory. It lives also in Cercis 

 canadensis, passing its earlier stages under the bark and appear 

 ing as a beetle in the latitude of Washington during the latter 

 part of June and continuing till toward the close of July. 



Curius dentatus Newm. also breeds in Cercis canadensis, 

 appearing abroad in this neighborhood early in July. 



Molorchus bimaculatus Say was reared from dead twigs and 

 branches of ash {Fraxinus americana), dogwood {Cornus 

 Jlorida), Cercis canadensis, and from the larva found in a wild 

 maple sprout. The adult insects abound on flowers of different 

 species of Primus, Cornus, Viburnum, et. /., in New York 

 State, occurring in May and June ; about Washington, also, in 

 April. This is included in the list of hickory species by Dr. 

 LeConte, and, according to Glover, infests also walnut. 



Rhopalophora longipes Say is not uncommon in Maryland 

 and Virginia near Washington. May 21 a few sections of 

 branches of red-bud were gathered from which the beetle was 

 reared May 24, others issuing early in June. It also occurs in 

 July, frequenting the flowers of Ceanothus americanus and Hy 

 drangea arborescens. 



Xylotrechus colonus Fab.,, a general feeder, partial to oak, 

 maple, and hickory, was reared on two occasions from chestnut, 

 June 8-14. It is parasitized by the rare Ichneumonid, Xylonomus 

 rileyi Ashm., a single example of which was reared June 15, 

 Rosslyn, Va. 



Neoclytus erythrocephalus Fab. is onfe of our most polypha- 

 gous species, having seemingly no favorite food-plant. I have 

 reared numerous specimens, always in about equal abundance in 

 trunk and branch, from Cornus florida, tulip (Liriodendron 

 tulipifera), locust ( Robinia pseudacacid} , Cercis canadensis, 

 hickory, and grape-vine, and have observed the adults on oak 

 and apple, usually copulating and in such abundance that there 

 could be no doubt as to the meaning of their presence. At 

 Washington the beetle occurs from the last of April till toward 

 the end of July. 



Individuals reared from locust were from twigs kept two years 

 indoors. In dogwood the larval galleries are very extensive, the 

 younger larva evidently passing a considerable portion of its 

 time under the bark, afterward penetrating the solid wood, which 

 is still more extensively bored. The pupal cell is often placed 

 in the centre of a large twig, the larva having previously excavated 

 an exit-hole to the bark. 



