HOW TO KNOW THE INSEQS 



26a Delicate insects with chewing mouthparts and but six 



abdominal segments. Underside of abdomen frequently has a long, 

 usually double, appendage (a) used for leaping. (Spring tails) 

 Fig. 63. Order II, COLLEMBOLA 



Fig. 63. Folsomla elongata (MacG. ) 



Gray to dark brown. Eyes eight on 

 ^^ii^^^^M^I^ each side. Antennae about equal to 

 iW^^^Ki^BlMw head. Furcula reaching posterior 



margin of second abdominal segment. 

 ^t^ Length up to 1.5 mm. 



A monograph of the Collembola of 

 Figure 63. lowa* by Harlow B. Mills, published 



in 1934, describes the 132 known 

 species of this order. Widespread collecting preceded the pub- 

 lishing of this list and while it is inconceivable that it is all 

 complete, it probably represents one of the best worked lists for 

 any order in our state. 



26b Not as in 26a 27 



27a With mouthparts for chewing 28 



27b With mouthparts for sucking 29 



28a Antennae thread like; face directed forward or downward. 

 (Crickets, roaches, grasshoppers, walking sticks) Figs. 64 

 and 79. Order VII, ORTHOPTERA p. 52 



Fig. 64. Ceuthophilus maculatus 

 (Harris) Spotted Camel Cricket. 



Brown, often with m.edlan 

 lighter stripe on thorax. Sev- 

 eral yellowish spots on dorsal 

 surface of abdomen. Length 14- 

 19 mm. 



Figure 64. While most of the Orthoptera 



are winged, the Camel Crickets, 

 or Walking Sticks, some roaches 

 and some crickets have been denied organs of flight. They have 

 chewing mouthparts, are herbivorous or omnivorous in their feed- 

 ing habits and often do serious damage. 



28b Antennae bead-like, club-like or corab-Hke. but without 

 prominent forceps at tip of abdomen. (Beetles) 



Order XI, COLEOPTERA p. 55 



Some female Fire Flies (Lampyridae) are wingless. They are 

 knovm as "glow worms." 



28c With prominent pair of movable forceps at tip of abdomen. 

 (See Fig. 37) (Earwigs) Order X, DERMAPTERA 



Wingless Earv;lgs are quite common in some regions. Earwigs 

 range in length from 3 to 35 mm. Their antennae are slender 

 and have from 10 to 35 joints. 



29a Small legless Insects firmly attached to plant leaves or 

 stems. Frequently covered with a waxy scale. (Scale insects) 

 Figs. 65 and 171. q^^^^. xvm, HOMOPTERA p. 83 



* "A Monograph of the Collembola of Iowa" Harlo-Ar B. 

 Press, Inc. Ames Iowa. 



;ills, April 20, 1934 Collegiate 



48 



