i68 



CONNECTICUT GEOL. AND NAT. HIST. SURVEY. 



[Bull. 



XIPHYDRIID^.* 

 Key to Genera. 



Radial and radio-medial cross-veins present Xiphydria p. 168 



Radial cross-vein present, radio-medial wanting ..Konowia p. 169 



Xiphydria Latreille. 



Key to Species. 



1. Abdomen in great part black 2 



Abdomen in great part red or yellow 4 



2. Antennae black; posterior tarsal claws with a moderate-sized 



tooth 3 



Antennae white at apex; posterior tarsal claws with a minute 

 - tooth; body black, with two small spots above antennas, 

 orbits extending in a line behind eyes, base of mandibles, 

 two lines on vertex, four lines on notum, a spot before 

 the wings, and seven spots on each side of the abdomen, 

 white; legs honey-yellow; wings hyaline. Length 10 mm. 



maculata 



3. Legs rufous or yellow; third antennal segment about twice 



as long as second; body in female black, with a spot on 

 clypeus, sometimes wanting, line beneath eyes, sometimes 

 interrupted, two spots behind ocelli, posterior orbits, 

 collar, and spot on each side of each abdominal segment, 

 white; tegulae and legs, honey-yellow. Male has white 

 spots on first four abdominal segments. Length 13 mm. 



canadensis 

 Legs black, with bases of tibiae and tarsi white; third anten- 

 nal segment subequal in length to second; abdomen with 



white spots on four basal segments. Length 11 mm 



tibialis 



4. Head, thorax, and legs in great part, black; body in female 



black, with two pale spots behind ocelli, and bases of 

 tibiae and tarsi, white; abdomen red. Male uniformly dark 

 brown, with a yellow spot on pleurae and inner orbits, or 

 sometimes entirely reddish yellow. Length 12 mm. attenuata 

 Head, thorax, abdomen, and legs, honey-yellow; tips of man- 

 dibles, slpt on vertex, a line above bases of antennae, lines 

 on neck, OTtures of pleurae, sides of basal plates, and dor- 

 sum of following abdominal segments except at middle, 

 brownish. Length 10 mm erythrogastra 



* In the preparation of the tables dealing with this and the following families free use 

 has been made of the manuscript of a paper by Dr. J. Chester Bradley, "A revision of the 

 cell R group. " The portion of this paper dealing with the Siricidae has been published 

 since this manuscript was submitted, under the title, Siricidae of North America, in Journal 

 of Entomol. and Zoo/., 1913, vol. 5, pp. 1-35. 



