Castolus bicolor Maldonado, 1976 A striking sexually dimorphic new species of Castolus (Hemiptera: Heteroptera Reduviidae) from Colombia, with new records from Neotropical countries and taxonomic notes on the genus Forero, Dimitri Mejía-Soto, Andrés Zootaxa 2021 2021-10-08 5048 4 538 560 RQPG Breddin, 1904 Breddin 1904 [151,586,1770,1797] Insecta Reduviidae Castolus Animalia Hemiptera 10 548 Arthropoda species nigriventris  ( Fig. 6A)    Castolus bicolor Maldonado, 1976,  new synonym.   Remarks. Maldonado (1976)did not include  C. nigriventris Breddin, 1904in his key or in his taxon treatment section. He stated that Breddin’s holotypeseems to be lost, and apparently was not at the DEI. We recently contacted Dr. S. Blank (DEI) and he confirmed that Breddin’s type is not there. We also contacted Dr. M. Husemann (ZMUH) who stated as well that Breddin’s type is not there, so apparently Breddin’s type could be lost. Alternatively, Dr. Blank indicated that it might still be possible for Breddin’s type to be unlabeled as a type and be sitting along his undetermined material, as has been the case with other Breddin type material. Unfortunately, so far, we have not been able to find such specimen.   FIGURE 6.Dorsal view of  Castolustype specimens. A.holotype of  Castolus bicolor Maldonado, 1976(synonym of  C. nigriventris Breddin, 1904); B.holotype of  C. bolivari Brailovsky, 1982; C.holotype labels of  C. bicolor Maldonado, 1976.  Maldonado (1976)indicated that Breddin’s description was insufficient to identify this species, but we disagree. Breddin (1904)described  C. nigriventrisas follows: “...a dull black, broad animal, in which only a longitudinal band of the posterior lobe of the pronotum, along with its broad posterior margin and the slender spicules of the humeral angles, as well as the hemelytra, and a very narrow margin of the abdomen [connexivum], are somewhat dull light yellow.” Following Breddin’s description it is clear that this particular and striking color pattern, being mostly black with yellow hemelytra and black and yellow posterior pronotal lobe, is exactly the same as the color pattern described for  C. bicolorMaldonado( Fig. 6A). The only difference is that the pale areas in the holotypeof  C. bicolorare rather orange than yellow. Therefore, because of the same coloration patter between the two species, we synonymize Maldonado’s species under Breddin’s.  Maldonado (1976)also offered an intriguing observation, he mentioned that he had examined a female specimen from Trinidadwith less extensive black areas on the pronotum, but otherwise very similar to the holotypeof  C. bicolor. He hypothesized that this might be the female of the specimen he described. Unfortunately, he did not illustrate this specimen. Similar to what happens in  C. lineatusand other species, some color variation might occur, with an extreme sexually dimorphic condition in  C. rafaeli  sp. nov.   Material examined.   Castolus bicolor Maldonado, 1976.   HOLOTYPE: TRINIDAD[ AND TOBAGO]— 1 ♂; W.I. [West Indies], Arima Valley;  800–1200 ft.;  Feb 1966; J. G. Rozencollector / (red label)  HOLOTYPE/ AMNH_ IZC 00343371(barcode)/ “  Castolus bicolordet. Maldonado” J Maldonado C1975 ( AMNH).   Distribution:  Castolus nigriventrisis known from Bolivia( Breddin 1904) and Trinidad and Tobago( Maldonado 1976). 3383561395 1966-02 J. G. Rozen Trinidad and Tobago 305 Valley 12 550 1 1 Arima holotype 3383561317 AMNH Trinidad and Tobago 12 550 IZC 00343371 1 holotype 3383561314 [551,1300,330,357] AMNH J Maldonado C Trinidad and Tobago Maldonado 12 550 1 holotype