Carcasses represent a trophic and reproductive resource or shelter for arthropods, which are a representative component of the decomposition process. Four experiments, one per season, were conducted in a semi-rural area of Bahía Blanca, Argentina, to study the trophic roles of cadaveric beetles, evaluating the abundance, composition and dominance during all decomposition stages and seasons. Species of necrophagous, necrophilous and omnivorous habits were found. Abundance, composition and dominance of beetles in relation to their trophic roles changed according to seasons and decomposition stages. Guilds and patterns of succession were established in relation to those periods. Trophic roles could be an indicator of beetle associations with decomposition stages and seasons.

The species Nitidula carnaria (Schaller) (Coleoptera: Nitidulidae) has economic and forensics importance. The mature larva, reared under controlled conditions of laboratory, was described for the first time. Moreover, preliminary information about the life cycle is provided. The time recorded from the instance mates placed together to the emergence of imago was 59 ± 2.4 days. This publication represents the first record of N. carnaria in South America.

La especie Nitidula carnaria (Schaller) (Coleoptera: Nitidulidae) tiene importancia económica y forense. Por primera vez, se describe la larva madura criada bajo condiciones controladas de laboratorio. Además, se suministra información preliminar del ciclo de vida. Desde la formación de parejas reproductivas hasta obtener el imago, el tiempo registrado fue de 59 ± 2,4 días. Esta publicación es el primer reporte de N. carnaria en Sudámerica.

The aim of the present investigation was to identify the fly producing myiasis in a patient with pediculosis. The patient was a male adult with a severe Pediculus humanus capitis' infestation and a lesion on his head containing larvae. Examination of these larvae revealed that they were Cochliomyia hominivorax. In this clinical case, the post-scratch lesions were infected with C. hominivorax' s larvae. It is the first time that the myiasis-pediculosis association has been mentioned in the literature

Un paciente, adulto, masculino, presentaba al momento de la consulta una severa infestación por Pediculus humanus capitis y una lesión en la cabeza de donde emergían larvas. El material extraído de la herida del paciente correspondió a Cochliomyia hominivorax. En este caso clínico, las lesiones producidas por el rascado del propio paciente permitieron atraer moscas C. hominivorax las que depositaron sus huevos en ellas de donde eclosionaron sus larvas que ocasionaron la miasis cutánea.