1 86 



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 

 in diameter, and was almost entirely covered with the insect and its 

 fiocculent 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 being 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) ha.\e been seen feeding upon 

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

 Fig. 50; the Twice-stabbed 

 lady-bird, Chilocorus hivul- 

 nerus Muls., Fig. 51; Pen- 

 it. iiliamiseUa he Conte; Scym- 

 FiG 50. -The Painted lady- y; ^^5 terminafus Say, and t,,^ ., Th^ Twi.'P «t«hhPd 



bird, IIarmonia picta: (I, the -' ' Fig. 5i. — Ihe iwioe-htaooea 



larva, enlarKed; 6, the beeUe Trir,(-l-,pr Snimntl^ Inrvn rlif- '•'"'>'-'Ji''''. Chilocorus bivulxe- 

 natural size; c, the same en- '••"'-''-"^^ ot/_(///t/tft<5 laiva, uil aus: the larva an.d inuago. 



''"'^*^''' fering from S. terminalus, 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 Clirysopa, and Fig. 

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



_^ Aphis. Jr\'.'^r. 



■■* The larva of a Heteropterous insect, resembling a ^^p'^"* ^^'^ 

 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 Cnmaronotus fraternvs* 



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 Orihates. 



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

 wood ant, Formica rvfa, has been noted. 



