Revision of the Genus Paratrechina (Hymenoptera : Formicidae) of the Continental United States

Cover Revision of the Genus Paratrechina (Hymenoptera : Formicidae) of the Continental United States
Revision of the Genus Paratrechina (Hymenoptera : Formicidae) of the Continental United States
Trager, James C.
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Mean WL/HL in parvula is 1.18 (cf. 1.20 in f lavipes , 1.24 in vividula ) .
Color is surprisingly constant in this species. Uni- form dark brown body and somewhat lighter, yellowish appen- dages are the rule. Typically, the middle and hind coxae are as dark as the fore coxa, though sometimes they are lighter as in f aisonensis or wo jciki . Many fully sclero- tized Georgia and Gulf Coast state specimens are very dark piceous brown. In these dark individuals, even the appen- dages are dark brown
... but appear lighter due to the pubes- cence. In Texas and Oklahoma, this species appears smaller than usual and is bicolored with a yellowish thorax and yellowish-brown head and gaster.
Male . (Composite description — no syntype males stud- ied though they probably exist in the Mayr collection at Vienna . ) TL 1.86-2.24, HL 0.51-0.57, HW 0.46-0.56, SL 0.54-0.63, EL 0.17-0.20, WL 0.69-0.85, GL 0.61-0.93, SM 0, CI 91-98, 01 34-36, SI 104-115, (n=ll).
108 Clypeus sublentiform; anterior border arcuate with median 1/4 to 1/3 ranging from flat to concave or even notched; rear border evenly arcuate except for shallow concavity at the anterior edge of the frons.


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