IV. INSEGTA: HEXAPODA, NEUROPTjRA. 



481 



of chirps per minute. The females may readily be recognized by the ovi- 

 positor. ACRIDIID.E ; antennae and ovipositor short ; tympani abdomi- 



FIG. 509. Locusta caudata. (After von Wattenwyll.) I, ovipositor. 



nal. Acridium* ; Melanoplus* (M. spretns, the 'grasshopper 7 which 

 did such damage in the Missouri River States in 1873-75) ; (Edipoda* ; 

 Tettix* LOCUSTID.E ; antennae* long ; tympani on first tibiae ; ovipositor 

 long, flattened ; tarsi four-jointed. Haden&cus* wingless, blind, in caves; 

 Conocephalus * ; Cyrtoplnlus * and Microcentrum,* katydids ; Anabrus* 

 wingless. GRYLLID.E, Crickets : antennae long ; ovipositor long, cylindri- 

 cal ; tarsi three-jointed; tympani on first tibia. Gryllus*; (Ecanthus* 

 tree crickets ; Gryllotalpa* mole crickets, burrowing. 



OrderlV. Weuroptera, 



The Neuroptera closely parallel the Archiptera, and the two 

 were formerly united, since they have the same wing structure and 



FIG. 510. Myrmeleo formicarius. (From Schmarda.) 1, imago; 2, larva; 3, pupa in its 



cocoon. 



show in general appearance great similarities. Thus the ant lions 

 (fig. 510) recall the dragon flies; the Chrysopinae, the Perlidae. 

 The Neuroptera, however, are holometabolous and have a resting 

 stage, although the pupae (pupae liberae) are capable of some mo- 

 tion. The mouth parts are for biting, and in some the labium has 

 no notch in the middle. 



