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The history and original concept of Parygrus Erichson, 1847, is reviewed, the genus is redescribed, and the status of the type species, P. erichsoni Waterhouse, 1876, is clarified. The four original species are reviewed, with photographs provided for the type specimens of P. angustatus Grouvelle, 1896, P. elateroides Grouvelle, 1896, and P. erichsoni, and a non-type of P. parallelus (Grouvelle, 1890). The holotype of P. parallelus is apparently missing. The female holotype of P. erichsoni is redescribed. An associated male P. erichsoni specimen is compared with the holotype and the male genitalia are described and illustrated. General descriptions and provisional diagnoses are given for P. angustatus, P. elateroides and P. parallelus. Five new species (P. guarani new species, P. lengua new species, P. maya new species, P. quechua new species, P. zamuco new species) are proposed, illustrated, and their geographic distributions mapped. For the first time, the male genitalia of Parygrus species are described and illustrated. A provisional key to the species and an updated key to the Neotropical genera of Dryopidae are provided.

Platyparnus gen. n. is erected to include three species of Helichus Erichson, 1847, from the Guianas of northern South America. Proposed taxonomic reassignments are Platyparnus bollowi (Hinton, 193...

A case is presented for the revival of an old, but very productive, insect collecting method. Seines made from readily-available and inexpensive materials were used to skim insect-bearing plant debris from the water surface of the El Dorado Canal near Pacific House in the Sierra Nevada of California. Fifty-six collecting events over a period of 26 years resulted in the accumulation of a large number of insects, especially beetles. Of the nearly 5000 specimens collected and prepared, about 3000 of them were beetles representing 72 families. Identifications of nearly 70% of the insect specimens by specialists revealed surprising taxonomic diversity and many uncommon species.

Amazonopsisgen. n.is described to includeA.theranyisp. n.from Peru, Venezuela and French Guiana, andA.camachoisp. n.from Venezuela. The descriptions are accompanied by figures illustrating the male and female habitus ofA.theranyi, the male habitus ofA.camachoi, and male genitalia of both species.Amazonopsistheranyiexhibits pronounced secondary sexual dimorphism which likewise may be a characteristic of the genus.Amazonopsismales have modified protarsal and mesotarsal claws, a pair of small spines on the anterior prosternum, and a pair of ventrally directed processes on the posterior metaventrite. Females ofA.theranyidisplay a pair of unique, oval perforations in the cuticle of the pronotum and have unmodified claws; females ofA.camachoiare unknown. Descriptions are furnished of the stream habitats and microhabitats where the study specimens were collected.

Barr, Cheryl B. (2016): An Unusual Leafcutter Ant/Scarab Beetle (Coleoptera: Scarabaeidae) Interaction in Panama. The Coleopterists Bulletin 70 (4): 812-813, DOI: 10.1649/0010-065X-70.4.812, URL: http://dx.doi.org/10.1649/0010-065x-70.4.812

Eubria mesoamericana Barr and Shepard, new species, is described from Panama and Costa Rica, accompanied by images of the adult and larva and illustrations of the male genitalia. Habitat information is provided for the specimens collected by the authors. The discovery of a new species of Eubria Latreille in the Neotropics reveals a surprising geographic disjunction from its only congener in the Palearctic, Eubria palustris (Germar). Placement of the new species in the genus Eubria is supported by adult and larval morphological characters.

Neoelmis guarani new species is described and illustrated from specimens collected in streams of the Cordillera de los Altos, southeast of Asuncion and near the towns of Piribebuy and Chololo, Paraguay. Males and females of this species exhibit strong secondary sexual dimorphism not found in other known species of Neoelmis . Males have striking modifications of the pro- and mesothoracic legs and bear a pair of ventrally projecting processes on both the mesoventrite and the second abdominal ventrite. Females have the elytra modified with a pair of dorsal projections.