Chironomus bipunctus Johannsen 1932

Adult

Length 6.5 mm.  AR abt. 2.5.
Thorax pale yellow; vittae deeper yellow; abdomen greenish-yellow, tergites with a large brownish transverse spot, divided longitudinally, more so on posterior segments.
Proportions of fore leg: 60 : 63 : 86 : 45 : 38 : 39 : 21.  LR abt 1.3.
Wings hyaline, costa not produced; crossvein not clouded; VR about 1.  Halteres yellow.
About 8 setae possibly in a single area on TIX.

Male hypopygium of C. bipunctus from Johannsen 1932.

Anal point long and narrow, rounded at distal end.  Superior volsella closest to D(e) type of Strenzke (1979); Inferior volsella reaches about 3/4 along the anal point or half way along the gonostyle, which is only moderately swollen and reduces markedly from about halfway along its length.

Female: Coloring like male.  Antenna six segmented (i.e. including pedicel), A5/A4 about 2; intermediate segments with a neck almost as long as the basal part.
Brown spots on tergites not longitudinally divided in available specimen.

Pupa:  Brownish, about 6 mm long.  Cephalic tubules small, fine and pointed.
Postero-lateral spur of segment VIII with a single spine.

Fourth instar larva:  Described by Lenz (1937), as a bathophilus-type, with short tubules.  Anal setae short and not on a distinct tubercle, anal tubules also short.

Found: Type locality - spring pool, Ngadsari, Java, INDONESIA; Also Tenger-Gebirge, East Java.