EXPERIMENT STATION BULLETINS. 



131 



Fig. «. 9<a.i\d\e-ha,vkCAteT]nUa.r, Emiii-etia sthnnlea. (Original.) 



Fig. 8 represents the larva of the saddle-back caterpillar about natural size. It is 

 apparently footless, progressing like a slug by the undulations of the soft shiny skin 

 of the under surface. The six jointed legs are present, but the soft fleshy pro-legs, that 

 caterpillars usually have, are absent. In general color it is a chocolate brown, having 

 a bright apple-green spot, shaped like a saddle-cloth, on the back. The saddle is rep- 

 resented by a brown oval spot in the center of the green. The four fleshy knobs or 

 conical projections are covered with sharp hairs that easily break off' when handled 

 and which convey a poison that acts very much like that of the nettle, producing a 

 sharp stinging or burning pain. The stings from this slug have been known to produce 

 serious results with people of delicate constitution. 



The specimens sent us were from Mr. A. Sigler, Adrian. Michigan, and they were 

 on pear. The species also works on cherry and probably on some other fruit-trees, on 

 oak and some other forest-trees, and on rose, grape, corn, Helianthus, currant, sumach 

 and raspberry. 



It has been found in the State several times before, once in Lansing by Mr. Victor 

 Lowe of the Geneva Experiment Station, but its occurrence in Michigan is rare. 



REMEDIES. 



This slug is easily destroyed by the arsenites, Paris green, etc., whenever it becomes 

 necessary. When stung by the hairs, relief can be obtained b.y bathing the affected 

 part with soda (bicarb.) or with a weak wash of ammonia. 



8. THE RESPLENDENT SHIELD-BEAREP. 



{Aspidisca splendorifcrella Clem.)* 



At the time when the leaves are just about to fall, during the last of September 

 and the first of October, the leaves of the wild cherry, Fruit us scrotina, are sometimes 

 seeji to be perforated with regular rows of holes about one-fourth of an inch long. 

 Sometimes as many as a dozen holes are ranged along lioth sides of the mid-rib of a 

 single leaf. Several trees on and near the Colloge campus were seen to be badly 

 pierced in this way, early in the autumn of 1S!)7. A sliort time afterward, numbers 

 of little pieces of leaf, corresponding in form to the holes in the cherry leaves, were 

 found attached by fine silken cords to the leaves and branches of a spruce tree stand- 



• This species was cletermineil h\ .Miss .Mary i;. .MiirtfcliU of Kirkwoinl. Mn. 



