HOW TO KNOW THE INSEQS 



17b Tarsal claws cleft. (Fig. 244) 



Fig. 245. 



Fit'ure 244. 



D.E 



Family 49, TIPHIIDAE 



Fig. 245. Ells qulnoueclncta (Fab.) 



(a, adult male; h, abdomen of male, 

 side view; c, abdomen of female; 

 d, antenna of female.) 



Glossy black with markings on head, 

 thorax and abdomen, bright yellow. 

 (Yellow changes to red If left too long 

 In a cyanide bottle.) Antennae and 

 Fipure 245. legs of female, yellowish brown, Anten- 

 nae of male dull grayish black; legs black at base, yellowish 

 brown at apex. Male with upturned black spine at tip of abdomen. 

 Both sexes partly covered with gray hairs; wings dark. Length 

 16-23 mm. 



Often very abundant on sweet clover In late summer. 

 18a Cheeks broad; eyes remote from base of mandibles. First 



ioint of hind tarsus flattened 19 



18b Cheeks narrow; base of mandibles close to eyes. First 



ioint of hind tarsus not much flattened 20 



19a Hind tibiae with apical spurs; eyes bare. (The Bumble 



Bees). Fig. 246. Family 62, BOMBIDAE 



Fig. 246. Bombus amerlcanoriun 

 (Fab.) 



Black, front part of thorax and 

 second and third abdominal seg- 

 ments and most of first yellow; 

 face black. Males with thorax 

 and abdomen almost wholly yellow, 

 except mldspot on thorax and 

 parts of first and last abdominal 

 segments, which are black. Legs 

 black. Probably the most abun- 

 dant species of bumble bee in 

 Iowa. Length 15-25 mm. 



We have a number of species of 

 Bumble bees in Iowa. They may 

 be counted among our highly valuable insects. Red clover is al- 

 most wholly dependent upon them for pollination and other plants 

 are also served in this way. Only the young queens live through 

 the winter, which accounts for the small colonies in early sum- 

 mer. Their contribution to the entertainment of small country 

 boys is worth considering. 



19b Hind tibiae without apical spurs; eyes hairy. (The Honey 

 Bees.) Fig. 247. Family 63, APIDAE 



Fig. 247. Apis melllfica 

 L. The Honey Bee. (a, 

 Worker: b, queen; c, 

 drone . ) 



There are several 

 strains, which vary In 

 color and size, bred by 

 bee keepers. Length of 

 worker 12-15 mm. Males 

 (drones) have large eyes 



Figure 246. 



Figure 247 



113 



