90 



hardly one could escape, as lias since proved to have been the case. 

 I find this parasite abundant in the two orchards, while many of the 

 old scales of last j-ear that still remain on the trees are tilled with 

 holes through which the parasites liave escaped. To this useful little 

 parasite, then, I give credit for protecting tlie plum crop in at least 

 two orchards. From this plum scale, received from Medina County, 

 I have reared Coccopliafiu^ Jccanii Fitch, Ennotns liridus Ashm., and 

 Pachy neuron altiscuta Bow., while from other material sent me from 

 Harrison County I have iei\ved AjJhyciis pulvinariw 'Rov;'. Moreover, 

 Comijs bicolor How. has been found in the insectary under conditions 

 that strongly point to its being also a i)arasite on this scale. These 

 parasites were determined by Mr. Howard. 



Colaspis hrunnea Fab. has been sent me, accused of destroying grow- 

 ing potatoes by eating the tops; also of destroying beans and corn. 



Cwiiig to tlie depredations of webworms among oats last spring, 

 some fields were resown, which has delayed ripening. Up to August 7 

 I had received Siplionopliora arencv, it being reported as attached to the 

 oat heads in immense numbers. The same plienomenon has also been 

 rei)orted from Pennsylvania, and 1 have observed it to a limited extent 

 on the station farm at Wooster, Ohio. This in part covers a period over 

 which I have for the last eight years been trying in vain to follow this 

 species. 



Brochymena annnJata is either increasing rai)idly or else I notice it 

 more closely, and I am rather fearful of trouble with the ill-odored 

 pest sooner or later. 1 find the eggs are hatching in northern Ohio all 

 through the month of July. 



The clover leaf- weevil {Fhytonomus punctatus), though it threatened 

 trouble last vSpring, was held back from doing any serious injury by the 

 fungus disease, Enlomopliiliora spluvrosperma^ and though the pest has 

 this year spread over the remaining area in the central i)ortion of the 

 State not heretofore occu])ied by it, yet I do not consider it a dangerous 

 insect, because there is little danger of enough larvae escaping this 

 deadly enemy to do much injury. 



The harlequin cabbage bug [Murgantia hisfrlonica)\ia:ii at last gained 

 a footliold north of the Ohio Eiver. It has been twice reported from 

 extreme southern Ohio (Scioto and Gallia counties) as having com- 

 mitted extensive depredations among cabbage last year, and is also 

 very abundant this year and rapidly spreading. This is the first 

 record of serious depredations north of the Ohio, so far as I am aware. 



I have this season had an op])ortunity to observe the work of Ceu- 

 thorhynchus rapce Gyll. in young cabbage plants. This species is not 

 yet included in Mr. Henshaw's lists of the Coleoptera of North America 

 north of Mexico, though it was reared from cabbage by Miss Murtfeldt 

 in 1888 at Kirk wood. Mo. I found the larvae, sometimes two or three 

 in a stalk, but reared only a single adnlt, and did not secure the pupa. 

 The i)iipaof a medium-sized hymenopterous parasite was found in one 

 of the burrows of the larva, but this also failed to develop to the adult. 



