The systematic position of Pamera noctuabunda Bergroth, 1907 (Hemiptera: Heteroptera: Rhyparochromidae), with a revised key to the species of Stalaria Harrington, 1980.

The rhyparochromid Pamera noctuabunda Bergroth, 1907 is shown to belong in the genus Stalaria Harrington, 1980, not in the genus Remaudiereana Hoberlandt, 1954, where it was placed by Harrington (1980). Stalaria nysias (Linnavouri, 1978) is synonymized with S. noctuabunda. The four species described in Stalaria are confined to Africa: their distribution is outlined. Specimens examined are listed, and a revised key to the species of Stalaria is appended.

Paraindopamphantus bruneiensis gen. nov. et sp. nov., as the first representative of the subfamily Pamphantinae from South East Asia (Hemiptera: Heteroptera: Geocoridae: Pamphantinae: Indopamphantini).

Paraindopamphantus gen. nov., containing one species, I. bruneiensis sp. nov., is reported from Brunei, as the first member of the subfamily Pamphantinae from South East Asia and the second from the Oriental Region. The strikingly myrmecomorphic P. bruneiensis, collected only from Bukit Sulang, nr Lamunin in Brunei in the canopy of Shorea johorensis Foxw. (Dipterocarpaceae) tree by insecticide fogging is described and illustrated. The genus is placed in tribe Indopamphantini, that at present contains only other genus Indopamphantus Malipatil recorded from the Western Ghats of India. The significance of the habitus and myrmecomorphy of this species, in relation to Indopamphantus makutaensis Malipatil, is discussed. A key to the two genera of Indopamphantini is provided.

A review of the genus Entisberus Distant (Hemiptera: Heteroptera: Rhyparochromidae: Drymini).

The genus Entisberus Distant is reviewed and illustrated and diagnostic characters listed. The type species, E. archetypus Distant is illustrated and diagnostic characteristics noted. The female of E. bergrothi Kondorosy is described for the first time. A new species, E. interruptus from Mindanao [Island] in the Republic of the Philippines, is described, and a revised key to the species of Entisberus is given.

Alaskan Heteroptera (Hemiptera): new records, associated data, and deletions.

Twenty-seven species of Heteroptera are recorded new to Alaska. Specimen data for ten additional species reported from Alaska without previously published data are also provided. Additionally, four species previously reported from the state are removed from the Alaska list of Heteroptera. 

Predation in Gerris (Hemiptera): Reactive distances and locomotion rates.

Two of the parameters which determine the rate at which prey are encountered by a predator, i.e. the distance at which a predator responds to a prey and its rate of movement relative to the prey's, were determined for all the stages of five species of Gerris using gerrids and Drosophila as prey. These parameters allowed calculation of the swath, or "encounter path", a gerrid would cover as it moved across the water surface. Gerris species prefer to attack live prey in front of them, and tend to ignore prey if the attack requires a turn of more than 100°. Hunger was found to affect the responsive angle required to clicit an attack by G. remigis, and regardless of species, smaller gerrids required the prey to be closer before an attack was initiated. The rate of movement in Gerris was measured as a function of stride length and the number of strides made per unit time. Stride length varied according to the length of the mesothoracic leg, and the frequency of movement was observed to be species specific. G. remigis, a stream species, moved 4-6 times as often as the four other species studied, all of which are characteristically found on non-moving water surfaces. Within a species, gerrid size had no significant effect on the frequency of movement, although there was a tendency for smaller gerrids to move less.

Food consumption in Gerris (Hemiptera).

The parameters influencing food consumption in larvae and adults of five species of Gerris were studied. An experimental components analysis was utilized with emphasis placed on measurements of the length of time the insects spent handling food items, and the amount of food in the gut at any one time. The following characteristics were noted: (1) The maximum feeding time required to achieve satiation was 2-2.5 h for all gerrids above 10 mg wet weight. For gerrids below this weight, feeding time declined at a logarithmic rate. (2) Body size had little influence on the duration of the feeding period after food deprivation; only with the first and second instar larvae was a significant difference noted. (3) The average duration of the feeding and non-feeding periods was 10.4 and 24.6 min respectively for satiated adult G. remigis in the presence of excess food. (4) Signifcant differences in relative digestive rate existed between adult and larvae irrespective of species. (5) The smaller the gerrid, the greater the volume relative to its body weight that could be consumed at a single feeding, and for all gerrids, the amount consumed per day was greater than the maximum amount that can be ingested at a single feeding, this difference being larger in the larvae than in the adults. (6) The relationship between daily amount consumed and temperature was linear for four species, increasing with increasing temperature; food consumption in G. remigis, however, peaked at about 19°C, and declined linearily at temperatures both above and below this value. (7) Irrespective of instar and stadium duration, food consumption for G. notabilis peaked within a stadium about 40% of the way through the stadium.