74 ENTOMOLOGICAL SOCIETY 



Lcemophlosus modestus, several spec- Leptostylus commixtus, common. 



imens. Liopus fascicularis, two speci- 

 Ino reclusa, common. mens. 



Lathropus vernalis, not rare. Ecyrus dasycerus, common. 



Soronia undulata, several speci- Mycetochares haldemani, one spec- 



mens. imen. 



Antphicrossus dllatus, one spec- Zaglyptus strialus, common. 



imen. Plocamus hispidulus, not rare. 



Trogosita corticalis, not rare. Hypothenemus eruditus, common. 



Agrilus egenus, common. Micracis rudis, one specimen. 



Petalium bistriatum, common. Eusphyrus walshii, not rare.* 



Any one who is in the least acquainted with the food-habits 

 of Coleoptera will at once see that the above list contains very 

 few species which may be peculiar to the Black Locust. The 

 Staphylinidcz and the Trogosita are probably predaceous ; all of 

 the Cerambytidtz and some of the other species are known to 

 live in other trees ; some other species are sap-beetles, not 

 particular in the choice of trees, and there remain only the 

 following, to be briefly commented upon : Sinoxylon dinode- 

 roides there is no previous^ record of food-habits, but judging 

 from the polyphagous habits of allied species it is not likely 

 that it will prove to be confined to Black Locust. Ino reclusa, 

 previously known only from Texas, where it occurred on 

 Hackberry. Zaglyptus striatus breeds in great numbers, in the 

 outer layers of nearly dead wood and is possibly peculiar to 

 this tree. Plocamus hispidulus is known to me only from Black 

 Locust, but is also not an injurious species since it lives like 

 the preceding. Micracis rudis I failed to discover the gallery 

 of this, and from the single specimen obtained it would be 

 premature to draw conclusions as to food-habits. It has pre 

 viously been recorded as boring under bark of Hackberry. 

 Agrilus egenus has frequently been bred before from branches 

 of Black Locust, and is the only species on my list which may 

 be injurious to the tree. 



The Black Locust is very abundant in the vicinity of Wash 

 ington but almost exclusively in the form of bushes or small 

 trees, while larger trees are very scarce except in protected 

 places, and still scarcer are healthy large trees. It is evident 

 that the growth of the tree must have one or several serious 

 checks, and while the frequent fires no doubt largely con 

 tribute to prevent a healthy growth of the tree I have become 



*Two species of Elaterid larvae,, a Buprestid larva (Chrysoboihris ?\ a 

 Melandryid (?) larva and several Cerambycid larvae dried up, and were 

 not bred. 



