39. Animal caterpillar-like (body more or less cylindrical) 40. 

 Animal not so worm- or caterpillar-like 53. 



40. Living in water 41. 

 Living on land 44. 



41. No legs present 



D\ptera Fly larvae, Maggots 

 Legs present 42. 



42. Usually found within a case made of sticks, sand or leaf fragments 



Trichoptera Caddis worms 

 Not in such a case 43. 



43. Body rather stout, slightly wider anteriorly; getting to be about three- 



quarters of an inch to three inches long 



T^europtera, Smhdae Alder Flies, Hellgrammite, Dobson or 

 Corydalus 

 Body usually more slender, usually tapering in the neck region; usually 

 smaller 



Coleoptera Water Beetle larvae 



44. No definite head 45. 

 With a definite head 47. 



45. In a small cell, usually of wax or mud, and often provided with pollen 



or insects for food 



Hymenoptera Bee and Wasp grubs 

 Not in such a cell 46. 



46. Slug-like, dark-colored, or with tufts of spines; feeding on leaves 



Lepidoptera, Eudiidae Slug-caterpillars 

 White or light colored; usually feeding on dead animal material 

 Diptera Fly Maggots 



47. With legs on abdominal region 48. 

 Without any abdominal legs or leg-like processes, except sometimes on 



the last segment 49. 



48. Not more than five pairs of abdominal legs, each usually ending in many 



minute hooks 



Lepidoptera Butterfly or Moth Caterpillars 

 Six or more pairs of abdominal legs, without hooks 

 Hymenoptera Sawfly Caterpillars 



49. With legs on the thoracic region 



Coleoptera Beetle Grubs 

 Without thoracic legs 50. 



50. Animal minute, but with definite biting mouth parts, and not with a 



black head 



Siphonaptera Flea larvae 

 (Suctona) 

 Not minute, or else with blackish head 51. 



51. Small, slender, usually pointed at posterior end; head blackish 



Diptera Fly Maggots 

 Up to two inches in length; head not especially evident 52. 



234 



