This species looks like a bee and is extremely rare. The body is small, 10-14 mm long and 2.5-3 mm wide. The color of the sexes is slightly different. Most of the male's body is black, only the back of the elytra is reddish-black; the thin stalks of the leg segments, tibia segments and abdomen are dark yellowish brown. Most of the female body is reddish brown, only the head, antennae segments 5-11, the ends of the elytra, hind wings, the ends of the enlarged parts of the fore leg segments, the enlarged parts of the middle and hind leg segments, and the base of the hind tibia are dark to black. .
The head is narrow, densely covered with rough wrinkles and dots, and the center of the back head is smooth; the male's antennae are longer, far beyond the end of the elytra, and the female's reaches the end of the elytra; the shank section is slightly curved, and the 3rd section is slightly shorter than the stipe section, and is the same length as the 4th section. , Sections 5-10 are flat and wide, with protruding outer corners, and there are dark brown thick short hairs on the inside of Sections 2-6. The pronotum is slightly wider than long. There are 3 smooth protrusions in the middle area, 1 small protrusion on each side, and there are obvious engraved points in the depression between the protrusions. The elytra are short, only reaching the base of the first segment of the abdomen, and then suddenly separate from the middle, gradually narrowing, and the end is blunt; the middle part of the back is sunken, with 4 rows of nicks, and the outer side is raised with 2 rows of nicks. The abdomen is almost smooth, with very small engraved spots; the length of the 1st and 2nd segments of the male's abdomen is equal to the sum of the rest of the segments, and the trailing edge of the last segment is deeply concave; the 1st abdominal segment of the female is the longest, equal to the sum of the rest of the segments, and the 2nd segment is the longest. There is a crescent-shaped depression behind the middle part, which is densely covered with fine golden hairs. The end half of the leg segment is enlarged, and the hind leg segment is the most enlarged, nearly spherical, densely covered with thick black hairs; the base half is thin-stalked; the inner and outer sides of the tibia have dense golden-yellow hairs.
Distribution: Zhejiang, Guangxi.
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