Larva a small plumosus-type; length about 8.0 - 12.0 mm (Bath and Anderson, 1969). Pale gula and frontoclypeus. Mentum with pointed teeth; centre (c1) tooth moderately broad with parallel or slightly diverging sides, c2 teeth well developed and sharp pointed (i.e. type II). Pecten epipharyngis with about 15 long tapering teeth. Mandible with third inner tooth darkened (generally type III). Ratio of antennal segments 25 : 5 : 1 : 2 : 1 (Bath and Anderson, 1969). Anal tubules 4 - 6 times longer than wide.
Cytology
: 4 pairs of chromosomes with the pseudothummi arm combination AE, BF, CD, G.
Arm G paired with a virtually terminal nucleolus at one end and two Balbiani rings, seperated by dark bands near the other end. The more distal BR is almost terminal in Mississippi populations due to an inversion, apparently as in C. columbiensis. No nucleolus in the long chromosomes. Inversion polymorphism occurs in arms D, F and G, although no heterozygotes have been found for the inversions in arms F and G. Two inversions occur in arm D, a short proximal one in California populations, and a distal one in Texas and Mississippi.
anyA1: 1a - e, 12 - 10, 4 - 9, 2d - 3b, 2c - 1f, 3c-i, 13 - 19
anyB1: Puff (group 7) about 1/3 from distal end.
anyE1: 1a - 2e, 9a - 10b, 3e-a, 8i - 3f, 10c - 13g
anyF1: 1a-i, 16 - 19d, 6b - 2, 15 - 14, 12 - 13, 6c - 11, 20 - 23 (Texas, Mississippi), as columbiensis
anyF2: 1a-b, 2b - 6b, 19d - 16, 1i-c, 2a, 15 - 14, 12 - 13, 6c - 11, 20 - 23 (California)
Click here for the polytene chromosomes.
Found: California - Stanford, Santa Clara Co.; Near Palo Alto, Riverside (incl.
'Midgeville', UCR
Campus), 3.5 mls. Palm Desert, & Corona, Riverside Co.; Arlington.
Mississippi - Jackson, Hinds Co.
Texas - Brackenridge Exptl. Stn., Austin, Travis Co.; Fish hatchery Galveston, Galveston Co. Called C. karensis
by Laufer et al. (1982)
Also found on St. Vincent Island, West Indies.
Sp. 51 of Frommer. Egg mass described (as C. sp. 1) by Morrow, Bath & Anderson (1968) and larva by Bath and Anderson (1969). Morphology and cytology described by Wülker, Sublette, Morath & Martin (1989b), some details of arms A, E and F given by Wülker & Morath (1989) and a photograph of arm G showing the location of the ssp160 gene (BR4) in Phillips et al. (1999).