Species name

Diabrotica spilota Baly 1886: 216


Type locality

Colombia, Oceana [misprinted OcaƱa]


Type depository

BMNH, lectotype, male, verified





Body length 5.6-6.5 mm, width 3.0-3.5 mm. Head basic color black. Antennae filiform, uniformly yellow or bi- or tricolored, antennomeres 1-3 yellow, antennomeres 4-8 uniformly yellow, yellow ocher or gradually infuscated, antennomeres 9-10 yellow ocher, antennomere 11 completely light (yellow ocher) or dark apically. Antennomere 3 less than 1.5 times longer than antennomere 2, male antennae length exceeds two third of elytron length. Maxillary palpi black or piceous, labrum black. Pronotum yellow or mustard yellow, subquadrate, nonfoveate or bifoveate, with small round foveae, not shagreened. Scutellum black or amber brown. Elytra yellow or rufous, maculate with six black or chestnut sharp edged maculae on each elytron, frequently connected one another. Epipleura completely yellow, sutural angle of elytron round, punctation scattered, fine. Abdomen yellow. Tarsi yellow or yellow ocher. Tibia uniformly yellow or yellow ocher, or bicolored: yellow, outer edge with piceous or testaceous line, or extensively darkened. Femora yellow or yellow ocher. Aedeagus symmetric, with four internal sac sclerites.


Known distribution

Mexico, Costa Rica, Panama, Venezuela, Colombia


Host plants



Potential problems with identification

Diabrotica spilota is very similar to D. biannularis Harold and D. chontalensis Jacoby. Sclerite 4C in the internal sac of aedeagus is slightly longer and slender in D. spilota than in D. biannularis and D. chontalensis. Diabrotica spilota is slightly larger than D. biannularis and D. chontalensis. It is possible that all three names belong to the same species. Jacoby (1887) noted about D. spilota: "there are, however, varieties before me in which the spots of the elytra are either transversely or longitudinally connected". Thus, D. spilota is most likely an example of an extreme pattern reduction in D. biannularis. Finally, Baly (1886) gave Mexico as a locality for D. spilota. Smith and Lawrence (1967) wrote that "It is possible that the Mexico record given by Baly is a misinterpretation of a [Magd] handwritten label". It seems that Mexico record was true and D. spilota range may be from Mexico to South America.