FIGURE 4 in Species status of Bombus monticola Smith (Hymenoptera: Apidae) supported by DNA barcoding

FIGURE 4. The character "furrow of gena" in Bombus lapponicus (4 A) and B. monticola (4 B). In B. lapponicus the surface between the punctures on vertex is rugose and dull (a), and the furrow is distinct, nearly reaching the compound eye (b). In B. monticola the surface between the punctures on vertex is shiny (c), and there is a slight depression with some punctures near the compound eye (d).