S. Mahunka szerk.: Folia Entomologica Hungarica 43/1. (Budapest, 1982)
FOLIA ENTOMOLOGICA HUNGARICA ROVARTANI KÖZLEMÉNYEK XLIII. 1. 1982 [>. 5-7 Record of Chaetocladius Kieffer (Diptera: Chironomidae) from India By P. K. CHAUDHURI and M. GHOSH (Received December 4, 1981) Abstract: A new speciea, Chaetocladius orientális is described from the oriental region. Chaetocladius was erected as a genus in the subfamily Orthocladiinae by KIEFFER (1911) on the basis of a species, Chaetocladius setiger Goetghebuer from Europe which was also taken as as the type species of the genus. The genus is characterised by the presence of bare eyes, erect acrostichal and dorsocentral setae, bare antepronotum, distinct microtrichia on wing membrane, slightly produced costa, fringed squama, empodium shorter than claws, bare anal point, gonocoxite with or without basal lobe and the well-marked gonostylus. BRUNDIN (1956) reaffirmed the generic status and placed a few more genera, Dyscamptocladius Thienemann, Orthocladius Group A Edwards and Pachycladius Kieffer in synonymy with it. As far as literature goes the genus has not so far been recorded from the Orient before this study. Material of the present study was collected from the Silent Valley, Kerala by light-trap operated during the month of May, 1980. The methods used to study the morphology of the insects are the same as followed by CHAUDHURI et al. (1979) and SOPONIS (1977). The microslide mounts of types and paratypes are at present with the collections of insects at the Department of Zoology, University of Burdwan and will finally be deposited in the National Collections of insects at the Zoological Survey of India, Calcutta and the Hungarian Natural History Museum, Budapest. Chaetocladius orientális sp. n. M ale: Colour dark brown. Body length 3.2 mm. Head. Eyes hemispherical without dorsal extension, interocular distance 0.15 mm. Vertex with 7 setae. Antenna dark brown to brown, length ratio of flagellomeres 9:5:5:5:5:5:6:6:6:5:6:7:123, AR 1.6. Clypeus with 9 setae. Thorax. Antepronotum collar-like having a shallow depression at the middle, and without seta. Acrostichals 19, dorsocentrals 20, prealars 12 and scutellars 12 in a row. Postscutellum with a longitudinal median furrow, dark brown and bare. Wing (fig. A). Brachiolum with 1 seta. Costa extended a little beyond R4+5 being 0.03 mm long; ending of R4 + 5 a little proximal to Cui; R2+3 ending about one-third of the distance between Rl and R4+5. Squama with 10 setae. Average length of wing 1.7 mm and breadth 0.40 mm. Vanarum ratio 1.2. Costal ratio 0.9. Legs. Fore, mid and hind tibia each with 1 spur. Spur of fore tibia 0.07 mm long. Hind tibial comb with 12 setae.
