Brown cockroach

Abstract: Precocene I I (6,7-dimethoxy-2,2-dimethylchromene) is a natura l ly -occurr ing compound possessing insect an t i juven i le hormone ac t i v i t y (BOWERS et al. 1976). The pr inc ip le ef fects of precocene I I upon sensi t ive insects are the induction of precocious metamorphosis, s t e r i l i z a t i o n , and diapause induction. In addi t ion, precocene I I treatment has been shown to i nh i b i t the production of sex a t t rac tants in v i rg in female cockroaches (BOWERS 1977). The mode of action of precocenes is not known, but they appear to in te r fe re with juveni le hormone secretion by the corpora a l la ta and i t is possible that the brain is the target s i te of these an t i juven i le hormones (BOWERS and MARTINEZ-PARDO 1977). The present study was conducted in order to elucidate the d i s t r i bution pattern and metabolic pathway of precocene I I in the brown cockroach (Periplaneta brunnea Burmeister).

Abstract: Prior to 1954, Periplaneta brunnea Burmeister had been reported from 5 counties in Texas (Hebard 1943). Except for its occurrence in Robertson County (Fig. 1) it seemed limited in this State to the tropical and subtropical coastal counties. Since Hebard's publication, 2 additional records of this cockroach in Texas are available. In 1954 Mallis reported it from San Antonio, Bexar County, and Dow (1955) reported collecting the species in Pharr, Hidalgo County. In the latter collection, the species was trapped in houses and privies and in 2 cases was associated with the American cockroach, P. americana (L.) (see Dow's communication in Roth and Willis 1960).

Abstract: We provide an updated checklist of Orthoptera and their allies for each Maritime province of Canada with details for 21 new species records. Drumming Katydid (Meconema thalassinum), recorded from Nova Scotia (NS) and Prince Edward Island (PEI), and Sprinkled Grasshopper (Chloealtis conspersa), recorded from New Brunswick (NB) are reported for the first time from the Maritimes as a whole. We report range extensions in the Maritime region for Australian Cockroach (Periplaneta australasiae; NB), Treetop Bush Katydid (Scudderia fasciata; NS), Short-legged Camel Cricket (Ceuthophilus brevipes; PEI), Spotted Camel Cricket (Ceuthophilus maculatus; PEI), Roesel’s Shield-backed Katydid (Roeseliana roesellii; NS), and Black-horned Tree Cricket (Oecanthus nigricornis; PEI). Short-winged Mole Cricket (Neoscapteriscus abbreviatus; NB) and European Mole Cricket (Gryllotalpa gryllotalpa; NS) are reported as adventives (non-native species that are believed to be not yet established), new to Canada from the Maritimes. Other new records for species not known to be established are Lined Earwig (Doru taeniatum; NS), Australian Cockroach (Periplaneta australasiae; PEI), American Cockroach (Periplaneta americana; NB), Brown Cockroach (Periplaneta brunnea; PEI), Smooth Cockroach (Nyctibora laevigata; NB), West Indian Leaf Cockroach (Blaberus discoidalis; NB), an unidentified Parcoblatta species (NB), Brown-banded Cockroach (Supella longipalpa; PEI), Praying Mantis (Mantis religiosa; NB), and American Bird Grasshopper (Schistocerca americana; NS).