Insect Orders
The Hemiptera Order: True Bugs
a.
b.
c.
d.
e.
f.
g.
h.
i.
j. 
k.
l.
m.
n.
o.
1a. Found on top of the water
See 2
1b. Found under the water
See 5
2a. Head much larger than the thorax (Figure a.)
2b. Head about the same size as the thorax
See 3
3a. Very small (about 2mm long); Wingless (Figure b.)
3b. Larger then 2 mm long; Adults have wings
See 4
4a. Small (about 4 mm long); pronotum wider than abdomen (Figure c.)
4b. Larger (greater than 5 mm long); Fore legs shorter then mid and hind legs (Figure d.)
5a. Fore legs raptorial (grasping) (Figures e., f., and g.); Apex of abdomen with respiratory appendages (Figures h. and i.)
See 6
5b. Fore legs not raptorial; apex of abdomen without respiratory appendages
See 7
6a. Respiratory appendages as retractable air straps (Figure h.)
6b. Respiratory appendages long and cylindrical (a siphon) (Figure i.)
7a. Swims right-side up; Beak triangular, very short; Front tarsus scoop-like (Figures j. and k.)
7b. Swims upside down; Beak cylindrical, varying; Front tarsus not scoop-like (Figures l. and m.)
See 8
8a. Hind legs long and oar-like, larger than 5 mm (Figure n.)
8b. Hind legs not long and oar-like; ovoid body shape; smaller than 4 mm (Figure o.)