182 Treubia Vol. Ill, 2. 



This seems to be most nearly allied to O. borneensis., Brun., which 

 differs in having the proboscis blackish, R4+5 not angled at the base, cell 

 M3 shorter, etc. O. javana, de Meij., the only other species previously 

 known from the Malayan region, differs obviously in having dark clouds 

 on the cross veins. 



Family Chironomidae« 

 Subfamily Tanypodinae, 



Procladius vitripennis, sp. n. 



Head white. Front broad, the eyes separated by fully the breadth of one, but 



with a narrow dorsal portion, two facets wide, extending towards the middle line, this 



narrow portion longer in the c/' than in the $. Palpi of cf all whjtish, of $ with the 



first three segments somewhat darkened; first segment less than twice as long as 



broad, second twice as long as first, third equal to second, fourth equal to second 



and third together. Antennae of o^ 15-segmented; torus large, dark brown; segments 



2—13 broader than long, segment 14 about one-fourth longer than 2— 13 together; plumes 



whitish, except on the apical third of the long segment, where they are dark. Anteimae 



of $ 14-segmented; torus small, white; flagellum rather dark brown; segments nearly 



globular, except the last, which is nearly 4 times as long as broad, its apical third 



slender. Thorax with the ground-colour white. Pronotum much reduced, narrow, with 



deep median emargination. Mesonotum bright ochreous stripes, the middle pair just 



touching and extending half-way from the front margin, ending posteriorly in two 



divergent points, the lateral pair touching the middle pair in front and reaching back 



to the scutellum; a narrow, continuous blackish external margin to all four stripes. 



Postnotum dark brown, with a v-shaped whitish mark in the middle at the base. Meso 



sternum and lower part of sternopleura dark brown, also a few small dark brown spots 



on the pleurae. Abdomen white; tergites 3-8 each with a narrow blackish basal line, 



broadening laterally; tergite 3 with a median basal black area, enlarged posteriorly in 



the middle of the segment; tergite 4 with a similar but rather larger black area; 



tergites 6 and 7 each with similar dark brown areas. Male claspers darkened, swollen 



at the base, ending in a rather sharp curved point. Legs whitish, the tip of the second 



tarsal segment and the whole of the last three tarsal segments on all the legs black. 



Hind tibiae with one longish comb, and one long and one short black spur. Front tibial 



spur about as long as the diameter of the tibiae. Front tarsus of & without beard, 



the first segment about one-third shorter than the tibiae. Wings hyaline, colourless, 



except for a small but conspicuous black spot over the r-m cross-vein. No trace either 



of macro- or microtrichia. Veins all pale. Costa extending nearly half-way from the 



tip of R4 + 5 to the tip of M; r distinct, but R2 + 3 faint, m-cu pale, placed below or a 



little before r-m; Cu forking well beyond the base of Rs. Haltères white. 



Length of body, cf 2.7 mm., $ 2 mm,; wing, 1.7 mm. 



lUiitenzorg, 21. i. and 1. iii. 1921 (Dr. H. H. Karny). 



Co-types, 3 d* I $ in the British Museum, 4 cT in the Buitenzorg Museum. 



I can find no species described which resembles this at all closely, 

 unless it can be Tanypus nlgrocinctiis, Dol., the diagnosis of which 

 is wholly inadequate and partly incompatible with the specimens before 

 me. The species agrees with Kieffer's interpretation of the geuns Pro- 

 cladiiis, though since Skuse does not mention the fourth tarsal segment, 



