246 



AN INTRODUCTION TO ENTOMOLOGY 



elevation above the surface of the ground in which they are usually 

 found. Most of our species are found east of the Great Plains; 

 one, CEcanthus calif ornicus, occurs in California; and one, CEcanthus 



& 



« t 



Fig. 264. — Basal segments of antennae of QLcanthus and Neoxabea. (The lettering 

 is explained in the text. (After Lugger and Fulton.) 



argentinus, in Texas. The species of eastern North America can 

 be distinguished by the following table, which is copied from a de- 

 tailed account of these insects by B. B. Fulton ('15). 



A. Basal segment of antennas with a swelling on the front and inner side. First 

 and second segments each with a single lalack mark. 



B. Basal antennal segment with a round black spot. (Fig. 264, a). . ffi. nlveus 

 BB. Basal antennal segment with a J-shaped black mark. (Fig. 264, b) 



CE. angustipcnnis 



BBB. Basal antennal segment with a straight club-shaped black mark. 



(Fig. 264, e) ffi. exclamationis 



AA. Basal antennal segment without a swelling on the front and inner side. 



First and second antennal segments each with two black marks or entirely 



black. Tegmina of males 5 mm. or less in width. 



B. Head and thorax pale yellowish green or black or marked with both colors. 



C. First antennal segment with a narrow black line along inner edge and a 



black spot near the distal end. Body entirely pale yellowish green. (Fig. 



264, d) ffi, quadripunctatus 



CC. First antennal segment with black markings similar to above, but 



broader and usually confluent, sometimes covering the whole segment. 



Head and thorax often with three longitudinal black stripes; ventral 



side of abdomen always solid black in life. (Fig. 264, c) . . CE. nigricornis 



BB. Head, thorax, and antennas reddish brown. Wings in life with conspicuous 



green veins. Marks on basal antennal segment broad but seldom con. 



fluent. (Fig. 264, f) (E. pini 



AAA. Basal antennal segment without a swelling on the front and inner side. 

 Basal portion of antenna red unmarked with black. (Fig. 264, g). Teg- 

 mina of male about 8 mm. wide (E. latipennis 



The species of CEcanthus that most often attracts attention is 

 the snowy tree-cricket, CEcanthus niveus (Fig. 263). The pres- 

 ence of this insect, though usually unseen, is made very evident in late 



