Smittia (Pseudosmittia) insulsa Johannse, 1946, new species
Creators: name: Johannse, O. A.
Publisher: name: Zenodo
Year: 1946
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Diptera
Chironomidae
Smittia
Smittia insulsa

description: 6. Smittia (Pseudosmittia) insulsa, new species (fig. 1, <i>j).</i> Male: thorax and abdomen velvet black, scutellum fuscous, pleura more or less shining. Antennae pale brown, basal segment and head black. Legs yellow, femora slightly darker. Dististyle of the terminalia sordidly white. Wings milky hyaline, without microtrichia, veins and halteres cream-white. Eyes bare. Ratio of 14th antenna! segment to segments 2 to 13 united, 1.16; last segment somewhat thickened. Thoracic bristles black, suberect. Costa of the wing well produced beyond the level of the tip of the posterior branch of the radius, second radial branch distinct, ending about midway between the tips of the adjacent veins, tip of the posterior branch of the radius ends slightly distad of the level of the tip of the anterior branch of the cubitus, media ends behind the wing tip, the cubital fork slightly distad of the level of the tip of the first radial branch, posterior cubital branch nearly straight, anal vein ends well before the cubital fork. Squamae not fringed, colorless. Hypopygium normal in size, the basistyle with large, acute angled inner lobe (fig. 1, j),dististyle with terminal spine of moderate size, anal point slender. Pulvilli absent, empodium about as long as the claws; the basitarsal-tibial ratio of the fore legs about 0.55, middle and hind tibiae with long spur, hind tibiae with a comb of bristles at apex. Female: dorsum of thorax pale yellow, with three wide black vittae, the laterals connected by a narrow black line in front of the scutellar suture; scutellum yellow; pleura and sternum dark. Abdomen velvet black. Halteres and legs cream colored. Antennae six-segmented, last segment thicker and nearly twice as long as the fifth, intermediate segments each with a few strong curved bristles. Pronotal collar normal. Costa and the first and third radial branches with a few black bristles; costa produced far beyond the tip of the third radial branch and ending nearer the apex of the wing than the media; first radial branch ends slightly distad of the level of the cubital fork; cubitus forks at the level of a third of the distance between the r-m crossvein and the tip of the third branch of the radius; anterior branch of the cubitus ends about the level of the tip of the third branch of the radius; second radial branch distinct; anal vein ends far short of the cubital fork; lobe of wing obtusely rounded as in the male. In other respects like the male. Length of male 1.2 mm.; wing, 1.1 mm.; female 0.85 mm.; wing, measured from the humeral crossvein 0.8 mm. Agana, May 25, Usinger. Holotype and allotype in the Cornell University collection; paratypes in the collection of the Experiment Station, Hawaiian Sugar Planters' Association. This species would fall in group D of Edwards (1929) except that the anal vein ends well before the fork of the cubitus. The third branch of the radius ends rather f~rther distad than in other species placed under <i>Pseudo­ S'lfl,ittia</i> by Goetghebuer (1932).
description: Published as part of <i>Johannse, O. A., 1946, Some New Species Of Nemocerous Diptera From Guam, pp. 187-193 in Insects of Guam II, Honolulu, Hawaii :Bernice P. Bishop Museum</i> on pages 191-192, DOI: 10.5281/zenodo.5169292