Manual of the Families And Genera of North American Diptera
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d. Wulp, contains many genera heretofore known only as exotic, not a few of which will doubtless be found in the United States when the family has received more attention with us.
TABLE OF GENERA.
1. Antennas of the J long-plumose or penicillate 2 Antennae of the ^ with short hairs. ..... lo 2. Second posterior cell wanting and hence no second basal cell. . 3 Second posterior cell present, the second basal cell complete. . 12 3. Fourth longitudinal vein furcate. ...... 4 Fourth longitudinal vei...n not furcate; antennae with an unequal num- ber of joints in the two sexes; antennal joints of the ^ plumose to the tip; thorax projecting in front over tlie head. ... 5 4. "Palpi composed of three joints". . . Tersesthes Townsend.
Palpi composed of four joints ; antennae of the male penicillate, the last joint bare ; dorsum of the thorax not produced over the head. ....... Ceratopooon Meigen.
CHIRONOMIDiE. 25 5. Anal angle of the wings obsolete. . . Corynoneura Winnertz.
Anal angle prominent. .........
What to read after Manual of the Families And Genera of North American Diptera?
You can find similar books in the "Read Also" column, or choose other free books by Samuel Wendell Williston to read onlineMoreLess
To quickly assess the difficulty of the text, read a short excerpt:
d. Wulp, contains many genera heretofore known only as exotic, not a few of which will doubtless be found in the United States when the family has received more attention with us.
TABLE OF GENERA.
1. Antennas of the J long-plumose or penicillate 2 Antennae of the ^ with short hairs. ..... lo 2. Second posterior cell wanting and hence no second basal cell. . 3 Second posterior cell present, the second basal cell complete. . 12 3. Fourth longitudinal vein furcate. ...... 4 Fourth longitudinal vei...n not furcate; antennae with an unequal num- ber of joints in the two sexes; antennal joints of the ^ plumose to the tip; thorax projecting in front over tlie head. ... 5 4. "Palpi composed of three joints". . . Tersesthes Townsend.
Palpi composed of four joints ; antennae of the male penicillate, the last joint bare ; dorsum of the thorax not produced over the head. ....... Ceratopooon Meigen.
CHIRONOMIDiE. 25 5. Anal angle of the wings obsolete. . . Corynoneura Winnertz.
Anal angle prominent. .........
What to read after Manual of the Families And Genera of North American Diptera?
You can find similar books in the "Read Also" column, or choose other free books by Samuel Wendell Williston to read onlineMoreLess
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