138 



CC. — Pectoral groove extending into the mesosternum, sharply 

 limited behind; front coxae not contiguous; me atho- 

 rorcic ep mera distinct, mesosternum feeb y emarginate 

 — Tyloderma. 



FRUIT-TREE 5C0L Fr/Z)5.— (Bark Beetles) 



Three Economic Genera. 



A — Venter of abdomen with caudal part bent abruptly upwards. 

 Antennal club flat and marked by angulated sutures — Eccoptogaster 

 riigulosus. (Fruit-tree bark beetle). 

 AA. — Venter of abdomen normal, regularly curved. 



B. — Antennal club lamellate, of three separate, laterally-produced 



segments; head visible from above — Phloeotribus liminaris. 



(Peach-tree Bark-beetle). 



BB. — Antennal club globular; truncate at tip, head deeply imbedded 



in prothorax whose anterior margin is nearly horizontal and 



invisible from above. — Xyieborus dispar. (Shot-hole borer). 



ORTHOPTERA. 



The Genera and Species of Blattidae. 



A. — Last ventral segment of female abdomen plane not compressed; 

 tore femora rarely provided with spines. 



B. — Sub-genital stylets present in the males, upper wings of females 

 short — Ischnoptera . 

 I. Pennsylvanica brown, sides of pronotum yellow. 

 BB. — Sub-genital stylets absent in the males. Upper wings of both 

 sexes long — Blattella. 

 B. Germanica (Croton bug), length 34 inch. 

 AA. — Last ventra' segment of female abdomen compressed and divided; 

 fore femora spined. 

 B. — Wing covers not reaching tip of abdomen — Blatta. 



B. Orientalis (Oriental Cockroach). 

 BB. — Wing Covers reaching beyond the abdomen — Periplaneta. 

 C. — Wing covers much exceeding abdomen^ — P. americana. 

 CC. — Wing covers but little exceeding abdomen; a bright 

 yellow stripe on basal half of their outer margin — P. 

 Australasiae. 



