Species groups of Crossodonthina Yosii (Collembola: Neanuridae), with the description of a new species and a new record for C. bidentata Luo & Chen.

A new two-eyed species of the genus Crossodonthina Yosii (Collembola: Neanuridae) is recorded and described from the Nanling National Forest Park, Ruyuan Yao Autonomous County, Guangdong Province, China. Crossodonthina quadridentata sp. nov.

New species of Crossodonthina from Mangshan National Nature Reserve (Nanling National Forest Park), China (Collembola: Neanuridae).

Two new species of the genus Crossodonthina (Collembola: Neanuridae: Neanurinae: Lobellini) are recorded from Mangshan National Nature Reserve, Chenzhou City, Hunan Province and Ruyuan Yao Autonomous County, Guangdong Province, Central-South China. Crossodonthina clavata sp. nov.

Two new species of Lobellini from Central-South China (Collembola: Neanuridae).

Four species of the tribe Lobellini (Collembola: Neanuridae: Neanurinae) are recorded from Langshan National Geopark, Hunan Province, Central-South China. Two of them, Crossodonthina langshanensis sp. nov.

A new species of and first record of from China (Collembola: Neanuridae: Neanurinae).

A new species of Yosii, 1956 and a key to all species of the genus is provided. It is distinguished from all known members of the genus by its unique set of morphological characters: mandible with six teeth, cephalic chaeta O present, and free from tubercle Fr, cephalic tubercle Oc with three chaetae, cephalic tubercle Di separate, and tubercle Dl with four (sometimes three) chaetae, Ant. I with eight chaetae, and claw with an inner tooth.

First record of the tropical genus Rambutanura (Collembola: Neanuridae: Neanurinae) in Palearctic, with description of a new species from China.

Genus Rambutanura Deharveng, 1988 of subfamily Neanurinae is herein recorded and a new species is described from China. A key to the species of the whole world of the genus is provided. In order to determine the new species, a new diagnosis within the genus Rambutanura Deharveng, 1988 is proposed.

Two new species of Lobellini from Tianmu Mountain, China (Collembola, Neanuridae).

Three species of the subfamily Neanurinae (Collembola: Neanuridae) are recorded from Tianmu Mountain, Zhejiang Province, east China. Two of them, and , are new to science and described in this paper. can be recognized by the presence of six teeth on mandible and the fusion of dorsointernal tubercles on the head.

Spectrophotometric determination of procaine hydrochloride in pharmaceutical products using 1,2-naphthoquinone-4-sulfonic acid as the chromogenic reagent.

Spectrophotometric determination of procaine hydrochloride is described. The procaine hydrochloride reacts with 1,2-naphthoquinone-4-sulfonic acid in pH 3.60 buffer solution to form a salmon pink compound, and its maximum absorption wavelength is at 484 nm, epsilon(484)=5.