ROSS: HOW TO COLLECT AND PRESERVE INSECTS 



45 



Fig. 46. — Mecop- 

 tera. Panorpa che- 

 lata, one of about 15 

 Illinois species of 

 scorpionflies. Actual 

 length about 0.5 inch. 

 Note the "scorpion" 

 tail; only the male 

 has this. 



early summer in shady woods, flying through the undergrowth. 

 In certain genera the adult male genitalia form a bulblike struc- 

 ture at the end of the body, as in fig. 46; this is harmless but 

 resembles a scorpion's sting, and it is this resemblance that gives 

 these insects the name scorpionflies. 



Hymenoptera Typically with two pairs of wings, antennae 



Bees, of various lengths, chewing mouthparts; 



Wasps, without tails. A typical member of this group 



Ants, is the wasp, Vespa maculata Linnaeus, fig. 47. 



Sawflies Many adult members of the group lack 



wings ; these include all the true ants, which 



are without wings except for the sexual forms produced at the 



time of the nuptial flights. Forms of one species, Lasius inter- 



jectus Mayr, are shown in fig. 48. The wings, when developed, 



are without scales, with the venation much less extensive than 



Fig. 47. — Hymenoptera. 

 Vespa maculata, the com- 

 mon bald-faced hornet. Ac- 

 tual length 0.8 inch. 



