Three ocelli on each side of the head 
Houndinshickory |= one Megacyllene caryae 
Found in mesquite ............ Megacyllene antennata 
Found in black locust ............... Megacyllene robiniae 
11. Pronotum brown, velvety pubescent; small irregular 
dorsal and ventral tubercles on body segments 
Leptostylus and related genera 
Dorsum of prothorax and dorsal and ventral surfaces of 
body segments armed with chitinous points 
TCLS ete cet ee ee Leen Eutetrapha tridentata 
invbasswood on inden 22. Saperda vestita 
ime hickony aE Ne et aed Saperda discoidea 
VII. BORERS IN OLDER WOOD IN MOIST CONDITION 
OR IN CONTACT WITH THE GROUND 
This group is composed mostly of large borers which occur in 
large numbers in the same piece of wood until it is completely 
riddled. Some are found in wood that has been cut a year or more 
and that is in contact with the ground. They are rarely found in 
recently dead or dying trees. Several of the species included here 
are also considered in Group VI, as the larvae may continue to 
bore for several years in stumps and logs lying on the ground. 
Cross ties, mine props, fence posts, foundation timbers, and fire- 
killed timber are subject to serious injury. A few species which 
attack exposed heartwood at the bases of living trees cause 
serious damage to shade trees. 
1. Pronotum armed with small recurved chitinous points 
Parandra 
Pronotum brown, covered with very fine hairs or points; 
two small dorsal spines on last body segments 
Asemum, Arhopalus 
Pronotum white, shiny, sometimes a little roughened or 
TUNGULOSC es een) Moe cee er ee ee ee a 2 
2. Dorsal and ventral surfaces of body covered with eral 
Pullen elesin. <5. hc Wer aie re eee rena ee Leptura 
Dorsal and ventral surfaces of body smooth; 2 transverse 
impressions dorsally... NG riot OR OR OL as tele eg eI GA E 3 
3. Front of head just above the mandibles proiertine in 
FECUNEORALIIDCT CICS 2 ln cote es ee 4 
Front of head projecting in transverse dull carina Cos 
times divided in middle) | cee beens a 5) 
4. Four rounded tubercles; body. an finely ried 
Ergates (Western) 
Four flat, sharp-edged teeth; body skin finely wrinkled 
Tragosoma 
Two flat, projecting teeth; body skin smooth, shiny 
Orthosoma 
5. Three ocelli on each side of head; body cylindrical 
Stenodontes and Archodontes 
One ocellus on each side of head; body wedge-shaped, 
tapering posteriorally .__....................Prionus pocularis 
175 
