Urocerus cressoni Norton, 1864

John M. Leavengood, Jr. & Smith, Trevor Randall, 2013, The Siricidae (Hymenoptera: Symphyta) of Florida, Insecta Mundi 2013 (309), pp. 1-16 : 13

Urocerus cressoni Norton, 1864

( Fig. 28-30 )

Diagnosis. Females have abdomen basally black and apically orange, the cornus also orange, black wings, the black head with a pale spot behind each eye and the antennal flagellum partly white with some basal and/or apical segments black. The females of other species have either clear to yellow wings (perhaps with blackish margins) or an entirely black abdomen (although the cornus is orangish in U. taxodii ). Males have entirely black legs, reddish abdomens (sometimes basally black), black wings and a black head with a pale spot behind each eye. The males of other North American Urocerus have clear to yellow wings and/or the presence of both black and yellow on the legs.

Bradley (1913) provided a key to the varieties of U. cressoni .

Natural history. The known hosts of U. cressoni include Abies balsamea Linnaeus , Abies fraseri (Pursh) Poir , Picea sp. , Pinus taeda Linnaeus , and Pinus rigida Miller (Pinaceae) ( Stange 1996; Smith and Schiff 2002; Schiff et al. 2006). Literature records indicate that it has been reared from Fraser fir.

Adults have been collected from July to November.

Distribution. Arkansas (new state record), Colorado, Connecticut, District of Columbia, Florida, Georgia, Indiana, Iowa, Maine (new state record), Maryland, Massachusetts, Michigan (new state record), Minnesota, Nebraska, New Jersey, New York, North Carolina, Ohio, Oklahoma (new state record), Pennsylvania, South Carolina, Tennessee, Virginia, West Virginia, Wisconsin and Canada ( Bradley 1913; Stange 1996; Smith and Schiff 2002; Schiff et al. 2006, 2012). Maine and Michigan are indicated on distribution maps in Schiff et al. (2012), however these states are not listed in the written distribution. In Florida a specimen was collected in Orange County.

Specimens. Canada: Nova Scotia: Victoria: Baddeck: Beinn Bhreagh , insect flight trap, 27-VII-1979, G.B. Fairchild ( FSCA; 1) ; USA: Arkansas: Nevada County: Bluff City seed orchard, ex. Pinus taeda , 16- XI-1976, H.N. Greenbaum ( FSCA; 1) ; Florida: Orange County: Orlando, UCF Campus , sand pine-rosemary scrub, Malaise Trap, 13-VII-1993, S. M. Fullerton ( UCFC; 1) ; Georgia: Madison County: Danielsville , 11-X-1972, R. White ( FSCA; 1) ; Maine: Penobscot County: Township A Range 7 [ca. Medway and East Millinocket (Llyod Davis, personal communication], Me. , 30-VII-1966, L.R. Davis, Jr. ( FSCA; 1) ; Michigan: Ingham County: Lansing ( FSCA; 1) ; New Jersey: Bergen County: Ramsey , 12-VII-1935, W.J. Gertsch ( FSCA; 1) ; Ohio: Hocking County: Neotoma , 10-VIII-1946 ( FSCA; 1) ; Oklahoma: Latimer County: VII- 1988, VIII-1990, K. Stephan ( FSCA; 2) ; South Carolina: Pickens County: 7 miles northeast of Pickens , 22-IX-1995, H.L. Dozier ( FSCA; 1) ; Tennessee: Blount County: Great Smoky Mountains National Park, Cades Cove , old field, gallery forest edge, Malaise Trap, 19-VIII-2004, G. Steck and B. Sutton ( UCFC; 1) .

Figures

Figures 28-32. Urocerus species. 28) Lateral habitus, female U. cressoni. 29) Dorsolateral habitus, female U. cressoni. 30) Wings of male U. cressoni. 31) Wings of male U. taxodii. 32) Dorsolateral habitus, female U. taxodii.