HOW TO KNOW THE INSECS 



42b Only four tarsal segments 43 



43a First four ventral abdominal segments fused. Tibiae 



dilated, armed with rows of spines for digging. (The 



Variegated Mud-loving Beetles) Fig. 134. 



Family 58, HETEROCERIDAE 



Fig. 134. Heterocerus ventralls Melsh. 



Black covered with brownish and yellowish 

 hairs; the latter In three Indistinct cross 

 bands. Length 6-7 min. 



The members of this little family are found 

 In burrows at the edge of our water courses. 

 At night they are sometimes found In great 

 numbers at lights. The other species are 

 smaller than ventralls. 



Figure 134, 



43b Ventral segments of abdomen not grown together, front coxae 

 globose 44 



44a Tarsi slender. (The Pleasing Fungus Beetles.) Fig. 135 



Fami ly 83, ENDOMYCHIDAE 



Fig. 135. Aphorlsta vlttata (Fab.) 



Shiny, brownish red. Markings on thorax and 

 elytra black. Length 5-6 mm. 



Look In decaying wood, bracket fungi and 

 under bark for the Pleasing Fungus Beetles. We 

 have but few species In Iowa but they are well 

 nsuned and make an Interesting addition to the 

 collection. 



Figure 135. 



44b Tarsi more or less dilated and spongy beneath. (The Hand- 

 some Fungus Beetles.) Fig. 136. Family 73, EROTYLIDAE 



Fig. 136. Ischyrus quadrlpunctatus (Ollv. ) 



Convex. Thorax and elytra yellowish red. Head 

 and markings on thorax and elytra black. Length 

 7-8 mm. 



This beautiful beetle Is found hibernating In 

 large numbers under bark and logs. That Is also 

 true of Megalodacne fasclata Fab. which Is con- 

 si derablylargerTlO^^T5~mm7y and displays less 

 red. 



Figure 136. 



45a Body elongate; antennae almost always long, often as long 

 as the body or longer. Base of antennae usually partly sur- 

 rounded by eyes. (The Long Horned Wood-boring Beetles.) Fig. 

 137. Family 101, CERAMBYCIDAE 



72 



