Ninth Report of the State EhTOMOLOGiST 331 



ance has been remarked upon by several writers. Dr. Riley having 

 received examples of it in Missouri, which were observed hopping 

 about during mild weather in midwinter, has written of it: "It becomes 

 active whenever the Aveather is mild. It is sometimes found in winter 

 in the early larva stages, but more often in the pupa state."* Dr. 

 Thomas has stated: " The larvae and the pupne and even the perfect 

 insects are occasionally observed during the warm days in winter. "f 

 Mr. Weed {loc. cif.) saw them in Peoria county, Illinois, in the month of 

 March, 1886, "hopping around on the grass, although the ground in 

 many parts of the field was covered with snow." Mr. Blatchley 

 records them as " frequenting drj^ open woods and roadsides, where the 

 half -grown young can be seen jumping vigorously about in any warm 

 sunny day in winter." In my Second Report (loc. cit.) record is made 

 of their occurrence in several localities in the State of New York 

 during the winter of 1882, in the month of February, in immense 

 numbers — millions as stated by some observers — jumping about on 

 the surface of the snow with all the life and activity of midsummer. 

 That a temperature of about fifty degrees above zero, Fahr., will 

 usually bring out the insect from its winter quarters, may be inferred 

 from the following data: Of the thermometrical conditions attendant 

 on the February (1882) occurrences in the State of New York, I have 

 written : " From Un average temperature for the several preceding weeks 

 of -|-27^ Fahr., it suddenh^ changed to a mean temperature (of one 

 week) of 40°, reaching at the highest, 56°." Almost the same condi- 

 tions seem to have attended the appearance at Canaan Four Corners 

 above reported: Thus, the average temperature of the week preceding 

 March 25th, as given in the " Report of the New York Meteorological 

 Bureau " for the month of March, for Alban}^, the nearest reporting 

 station to Canaan Four Corners, was -\-2S^°; that'for the week following 

 (25th to 31st), 40°; the highest temperature observed, 57°, on the 26th. 



The Two Forms of the Insect. 

 A description of C. viridifasciata has been given in the Second 

 Report on the Insects ofNeic York. Figure 15 represents the full-grown 

 insect, and its larva in ij^»^ ^.^ ^ y^ 



The dimorphic forms un- a^ __=-53f*^ i^ ^ X,.^ 



der which it appears are . ^.^j^ ^^^ 



quite marked. Thev have Fig. is.— The green-striped locust, Chortophaga viridifas- 

 , 1 1 1 * ciATA. yuung and adult, 



been thought by some 



* Eighth Report on the Insects of Missouri, lSr6, page 149. 

 t Eiglith Report on the Insects of Ilhaois, 18S0, page 1C6. 



