Top 20 Most Common Insects in Hiroshima

The giant resin bee (Megachile sculpturalis) is a big fan of using the environment to their advantage, as they do not bore through wood. Instead, they use pre-existing holes and cap those holes with resin, which is where they earn their name. It is also much larger than other leafcutting bees (Megachilidae), which is where they get the "giant" part of their name.

Males and females upperside white, in many specimens pale ochraceous yellow, veins black. Forewing with four very slender irregularly sinuous transverse black lines, the costal margin shaded with ochraceous at base and fuscous beyond; cell crossed by three or four additional short lines; a postdiscal very incomplete series of white-centred broad fuscous rings in the interspaces, tinged with ochraceous near the tornus and broadly interrupted in interspaces 3 and 4; beyond this two transverse black lines not reaching the dorsal margin, shaded with fuscous between; the apex broadly and the termen also shaded with fuscous. Hindwing with three transverse fine lines; a pair of postdiscal broad black lines shaded with light sepia brown between, forming a conspicuous band, the outer line broken and incomplete, followed by two irregular black lines, a subterminal more pronounced black line, and posteriorly a narrow black terminal margin; dorsal margin broadly fuscous at base; apical half and the tornal area and lobe rich ochraceous, with some sepia-brown and black markings. Underside similar, the markings of the upperside showing through by transparency; the ochraceous shading on dorsum and tornal area on hindwing of less extent, but the tornal lobe darker ochraceous with a central large round black spot. The markings both on upper and undersides vary a little in depth of colour and breadth. In many specimens there is a diffuse fuscous spot between the discal pair of transverse fine lines on forewing. Antennae, head, thorax and abdomen above black, thorax and abdomen with lateral greyish longitudinal stripes: beneath white. Body of the female paler than that of the male. Expanse 6 - 7 cm. The eggs were curious and beautiful, high domed-shaped or almost conical, with an aperture at the top fitted with a deeply dentate flat cap like a cogged wheel. The larva was unlike any other that, we have ever seen, slender, cylindrical and smooth; with two long curved divergent filaments or soft horns on the head, a single at outer sword-shaped one on the back at the 5th or 6th segment curved backwards and serrated on its inner edge, and another on the last segment curved forwards and serrated on its outer edge. The colour was a fine reddish brown with a broad green band on the side from the 5th to the last segment. The pupae were suspended by the tail, very much compressed, with a dorsal ridge from head to tail, high and obtusely pointed in the middle, the palpi-cases united and produced into a long somewhat recurved snout; colour brown with fine dark striae.

It can grow between 10 cm and 10 cm in length.

Its wingspan is about 8 cm. The mid and hind tibia are spiny. Hindwings of male with long hairy inner margin. Head black and thorax vinous reddish brown. Pectus white. Abdomen bluish fuscous with a white tuft in male below claspers. Forewings with brown suffused with black, except costal area as far as postmedial line and the apical area, and irrorated with a few bluish-white scales. A short almost basal line, two black sub-basal patches, an oblique waved antemedial line present. A black spot in cell and two lunules at end of cell. Traces of a pale waved sub-marginal line can be seen. Hindwings are black with a bright blue patch on disk and a maculate post-medial band and patch near anal angle. Larva black. Somites with transverse dorsal white bars each enclosing a black line. Stigmata ochreous, black ridges and with some red color around the, situated on white patches from near the top of each of which springs a white hair. There is an inter-spiracular disconnected white line and a broader spiracular line with a black spot from which springs a white hair below each spiracle. A broad ventral white band present. The 11th somite humped and black above. Extremity orange above spotted with black. Head and somites are covered with long white hairs.

The larvae of the varied carpet beetle are common pests in houses since they like to feed on natural fibers and can damage carpets, furniture, and clothing. They also consume dead insects, making them a pest in museums and other places with insect collections. It can live for 1-3 years in total.

The wingspan is 1.5 - 2 cm. Forewings brownish to reddish brown. A dark-brown pre-tornal spot is distinctive in females, but faded in males. Males possess sex scales on the hindwing, hind tibia, and abdomen. Females with a costal fold on forewings, which is absent in males. Eggs are white, round and flat, and laid in small groups of 15 on the fruit. Late instars are 1.3 - 2 cm long. The abdomen of the caterpillar is yellowish white. In the final instar, its color turns to red. Pinacula large and darker than body. Head and prothoracic shield blackish to dark brown in early instars which turns pale to yellowish brown in final instars. Anal comb rudimentary with 4-6 small teeth. Pupa yellow brown.