The common map has less, and the black-knobbed has a lot.
普通地图背上没有很多瘤子，但是黑瘤地图就有很多很大的瘤子。
2
Any of various insects of the order Lepidoptera, characteristically having slender bodies, knobbed antennae, and four broad, usually colorful wings.
蝴蝶多种鳞翅目类昆虫，特征为身体细长，触须突出，有四个通常是彩色的宽大的翅。
3
They also reputedly need pristine water quality & are prone to shell problems if such is not maintained (Cagles & Black-knobbed are reputed to be bad about this;