The unknown females of Astaena nigrocephala Lago, 2021 and males of A. paracorrugata Lago, 2021 are described, both from specimens collected in western Panama near the original type localities. Errata for the Lago, 2021 paper are included in the discussion.

Mesocheira bicolor (Fabricius) is a cleptoparasite bee, widely distributed in the New World from Mexico to northern Argentina. In Argentina, this species is only documented from Formosa. In this contribution, we report new records of males and females reared from trap nests obtained from different studies about nesting biology of solitary bees in pre-existing cavities in several Argentinian provinces. Also, we studied material from Argentinean research collections, and we searched for occurrence data in the Global Biodiversity Information Facility. Adults of M. bicolor were reared from nests of Centris (Hemisiella) tarsata and C. (Hemisiella) nigriventris Burmeister. Here, we reported eight new provincial records that widely increase the geographical distribution of this species in Argentina, expanding its austral-most distribution record by more than 1,000 km.

In this study, the male reproductive system histology and anatomy of Melanophila picta decastigma were examined with light and scanning electron microscope. At the end of the examinations, it was seen that the male reproductive system of M. picta decastigma has a pair of testes, vasa deferentia, accessory glands, spermatophoral glands, an ejaculatory duct and an aedeagus. The testes are yellowish proximally and white distally. Each testis has seven follicles. Spermatocytes are grouped in the growth zone; bundles of spermatids are evident in the maturation zone that differentiate into spermatozoa in the differentiation zone. The vas deferens attaches to the proximal part of the testis. The vas deferens is long, coiled and contains spermatozoa. The wall of the vas deferens is surrounded medially by a monolayer cubical epithelium with round nuclei. It opens into the ejaculatory duct proximal to the vas deferens. Another structure that opens into the ejaculatory duct is the spermatophoral glands. In the longitudinal sections of the spermatophoral glands, is distinguished that they are filled with eosinophilic secretory material in the lumen. The wall of the gland is surrounded by multilayer epithelium and a thin layer of muscle. The ejaculatory duct wall is surrounded by a monolayer of epithelium and a rather thick layer of muscle. The ejaculatory duct connects with the aedeagus at its proximal end. As a result of the researches, there is no study on the reproductive system of the genus Melanophila.

Morocco′s aquatic biodiversity remains insufficiently studied, especially in terms of invertebrates, with numerous gaps persisting, even in protected areas. This study combines our research with existing studies to provide a comprehensive list that encompasses both old and new faunistic and distributional records of three orders of aquatic insects (Ephemeroptera, Plecoptera and Trichoptera) in Tazekka National Park, located in the Eastern Middle Atlas Mountains.

We provide an annotated list of 33 species, 23 of which were identified from 1400 specimens collected seasonally between the summer of 2018 and 2019 at 19 sampling sites. The remaining 10 species were identified from the literature sources and were not captured during this study. These 33 species belong to 31 genera and 21 families, comprising 9 species of Ephemeroptera, 14 species of Plecoptera, and 10 species of Trichoptera. The most interesting faunistic novelties consist of the capture of Epeorus cf. torrentium Eaton, 1881 (Ephemeroptera), Micrasema moestum Hagen, 1868 (Trichoptera), and Brachyptera auberti Consiglo, 1957, and Leuctra geniculata (Stephens, 1836) (Plecoptera), which are new records for the Middle Atlas.

Furthermore, this work provided the first data on the Ephemeroptera of the Tazekka National Park. Additionally, 9 species of Plecoptera and Trichoptera were newly captured in this park.

A chorological analysis revealed that most species are predominantly Mediterranean 61%, while those with a wider distribution occur in the Palearctic constitute the remaining 39%. In terms of endemism, 80% of the species recorded are endemic in the broad sense, with 44% classified as Ibero-Maghrebian, 31% endemic to the Maghreb, and 25% strictly Moroccan endemics.