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The extinct caddisfly genus Palerasnitsynus (Psychomyiidae) is revised, based on nine new species embedded in mid-Cretaceous Burmese amber. They can be distinguished from all other extinct and extant psychomyiid genera by the absence of fork III in their fore- and hindwings and by the presence of latero-apical dark sporns at the 3rd maxillary palp segment. These species belong to the smallest Trichoptera hitherto known, with forewing lengths of 1.8–2.6 mm. Moreover, the micro-caddisflies of the genus Palerasnitsynus are very common and comprise almost 60 % of all caddisflies in Burmese amber. Some amber pieces contain aggregations of specimens which indicates swarming activities of the adults.

We describe two caddisflies from mid-Cretaceous Burmese amber, with unusual hair fan modifications on the legs: Cretaganonema dongi nov. gen. et nov. sp. (Calamoceratidae) possesses greatly elongated hind legs with hairtufts at the tarsal apex; Cretahelicopsyche liuyani nov. gen. et nov. sp. (Helicopsychidae) bears a hair-fan on the tibia of the middle legs. The functions of the leg modifications in the fossils are unknown, possibilities are briefly discussed. The species described here represent the third known calamoceratid and the first helicopsychid from the Cretaceous, thus increasing our scant knowledge on the Cretaceous Trichoptera biota and their adaptations.

The lacewing family Nevrorthidae (Insecta, Neuroptera) is reported from mid-Cretaceous Burmese amber for the first time. This paper describes the new genus and species Cretarophalis patrickmuelleri. Moreover, fossil nevrorthid larvae are recorded in Burmese amber for the first time. These mid-Cretaceous lacewings are the hitherto oldest representatives of the family Nevrorthidae.

This paper gives an overview of nine extinct species assigned to five genera of the neuropteran family Nevrorthidae found in Eocene Baltic amber. Three species are described new: Baltico neurorthus elegans n. gen., n. sp., Palaeoneurorthus eocaenus n. sp. and Proberotha dichotoma n. sp. Moreover, the genus Proberotha Kruger, 1923, originally assigned to the family Berothidae, is now transferred to the family Nevrorthidae. Proberotha prisca Kruger, 1923, exhibits significant traits of the Nevrorthidae Nakahara, 1958, a family which has not yet been established at that time.

This paper describes four new species of the genus Wormaldia (Philopotamidae): W. transversa, W. cercilonga, W. cercifurcata, and W. squamosa, all from Burmese amber. They belong to so-called micro-caddisflies, which, together with many other Philopotamidae, Psychomyiidae, and the Hydroptilidae, rarely exceed a wing length of ca. 3.5 mm. These micro-caddisflies obviously dominate the mid-Cretaceous Trichoptera fauna of Burmese amber.