l86 SECOND REPORT OF THE STATE ENTOMOLOGIST. 



not affect all the trees, and those that are free from it are vigorous and 

 healthy, which leads me to the opinion that this white substance is the 

 cause. 



The piece of limb sent was ten inches in length, nearly two inches 

 ii) diameter, and was almost entirely covered with the insect and its 

 flocculent mantle, some of the fibres of which were a quarter of an 

 inch long. When received, August 7th, large numbers of the young, 

 of almost an orange color and of an elongate form, were associated 

 with the dark brown adults, showing that the attack of which complaint 

 was made, was bemg actively and persistently continued. 



Natural Enemies. 



The multiplication of this insect is checked by quite a number of 

 natural enemies that are known to prey upon it, and to be very active 

 in its destruction. 



Five species of lady-birds (CoccinellidcB) have been seen feeding upon 

 it,viz., the Painted lady-bird, Harmonia picta Rand., 

 Fig. 50; the Twice-stabbed 

 lady-bird, Chiloconis hivul- 

 nerus Muls., Fig. 51; Pen- 

 « tiliamisella LeConte; Scym- 



Jrtli'.nT:!^Ll^l;^::l%''"'' termiuafuS Say, and f,„. ,,.- The Twice-stabbed 

 larva, enlar«eil; 6, the beetle nn^tK^r .Q/> )/rn i j ■»/ o 1o,-<n r^',f laily-binl, Chilocorus bivulne- 

 natural size; c, the same en- '"■nULUCI uot/iK-flUi, larva, Ull- rus; the larva and imago. 



'^^^^'' fering from S. terminatus, but not reared to 



its perfect stage. 



A larva of a lace-winged fly, Chrysopa species, that covered its back 

 with the woolly material stripped from its victims, was observed by Dr. 

 Shimer; also the larvae of unknown species of Syr- 

 phus flies. These larvae are known to render most 

 excellent service in the destruction of plant-lice. 

 Fig. 52 represents the larva of Chrysopa, and Fig. 

 53 that of a Syrphus fly in the act of devouring an C 

 „ ^, Aphis. ,^i«- 53-- 



FiG. 52.— ' Larva of a 



Kxce-winU The larva of a Heteropterous insect, resembling a ^^^p"^"' '*''• 

 soPA, sp!"^^" small ant, was seen running actively about the infested pines, 

 seizing and sucking the juices of the insects. It was determined by 

 Mr. Uhler as (Jamaronotus fraiernvs.^ 



Prof. Osborn discovered some round, black, hard and shiny mites 

 within the downy balls of the Chermes which were believed to be feed- 

 ing upon them. They evidently belonged to the genus Oribates. 



* The resemblance of the European Camaronotus cinnamopterua Kirsch., to the large 

 wood ant, Formica rttfa, has been noted. 



