HOW TO KNOW THE IMMATUI^ INSECTS 



9a. Prothorax small, meso- and metathorax modified either long and 

 in linear form or short and in leaf form; antennae shorter than 

 the body; cerci not segmented. Fig. 161 Family PHASMIDAE 



■ i^ort^oifA^ 



They are commonly known as walkingsticks and 

 leaf insects because of their body structures closely 

 resemble the twigs or leaves. Over 700 species are 

 described. All of them are vegetable feeders. 

 The nymphs and aduhs of many species appear much 

 alike for most aduhs are wingless. The eggs are often 

 dropped at random. 



Fig. 16 1. Walk- 

 ingstick, D i a - 

 pheromero f e - 

 morato (Say) . 



9b. Prothorax large, projecting over the head; antennae as long as or 

 longer than the body; cerci segmented. 

 Fig. 162 Family BLATTIDAE 



About 1,200 species of cockroaches are known 

 and they occur under dead leaves, moss, refuse 

 and on flowers and bushes. The most familiar do- 

 mesticated species are the German cockroach, Blai- 

 tella germanica (L.), the American cockroach, Peri- 

 planeta ameiicana (L.), and the Australian cock- 

 roach, Periplaneia australasiae (Fab.). They have 

 been distributed throughout the entire world and 

 are household pests. The females may often be 

 seen carrying their egg cases which are presently 

 cSkr!>a?h,''"B7.T. left for hatching. 



telle germanica (L.). 



ORDER COLEOPTERA 



(The key is mainly compiled from Boving and Craighead, 1931. 

 and Van Emden, 1942.) 



la. Legs consisting of 5 segments (coxa, / 's^ 

 trochanter, femur, tibia and tarsus) and v^ \ 

 1 or 2 distinct claws (except in instars 

 of MicTomalthus which are legless or 

 have 2-segmented legs). Fig. 163 2 f^'9 '63. A leg. 



72 



