MORGAN HEBARD 193 



ninth. Cerci straight and slender. Operculum with lateral margins weakly 

 convex-convergent distad to the acute apex, which fails to reach the median 

 portion of the ulthnate tergite, leaving the distal portion of the ovipositor 

 valves exposed. Median femora no heavier than cephalic, median and 

 caudal femora with distal spine of ventro-internal margin simple, straight, 

 smaller than in male. Median and caudal tibiae with medio-longitudinal 

 and lateral carinae of ventral surface smooth, hairy and terminated distad 

 each in a tuft of spinLform hairs. 



Coloration of male. General color prout's brown, becoming sepia on 

 pronotum and mesonotum. Ventro-lateral portions of head, lateral portions 

 of pronotum and of thorax only above insertion of limbs, pinkish buff. Pleura 

 nopal red, this faintly tinging the mesonotum latero-cephalad. Caudal 

 femora ochraceous-buff, median and caudal tibiae antimony yellow, all 

 suffus(3d with brown distad. Female uniform and immaculate light green. 



Length of body, cf 78.7, 9 93.4; length of mesonotum, d" 19.2, 9 20.3; 

 median width of mesonotum, cf 1.2, 9 2.8; length of metanotum (including 

 median segment), d' 16, 9 17.2; length of median segment, cf 1.9, 9 2.1; 

 length of first tergite, cf 6.5, 9 6.8; length of seventh tergite, cf 2.2, 9 3.2; 

 length of eighth tergite, cf 1.3, 9 2.3; length of nmth tergite, cf 1.8, 9 2.8; 

 length of cercus, cf 3.3, 9 2.8; length of operculum, 6.7; length of cephalic 

 femur, cf 23, 9 24.2; length of median femur, cf 16.8, 9 17.7; length of 

 caudal femur, cf 22.4, 9 22.8 mm. 



This species is known to us only from the described pair. 



PHIBALOSOMINAE 



Bostra aetolus (Westwood) 



18.59. Bacteria aetolus Westwood, Cat. Orth. Ins. Br. Mus., i, Phasmidae, 

 p. 27, pi. XXII, fig. 3. [9, Mexico.] 



Venvidio, VI, 16, 1918, 2 jub. 9 ; VII, 6 to IX, 2, 1918, 7 cT, 

 14 9 , 1 large juv. d^. 



The present series is of great interest in that it shows tlie 

 position of aetolus to be in Bostra as at present understood, the 

 close affinity of the species to B. jaliscensis Rehn,"*" and dem- 

 onstrates thoroughlj^ the fact that the auricular processes of the 

 head, lobes of the abdomen and limbs and cristation of the 

 metatarsus, developed in the female sex, are all features subject 

 to enormous individual variation in this and probably many 

 other species of the group. 



The following variation is noted in females of the present 

 series. Head merely tubcrculate; or with a transverse ridge of 

 heavier tubercles on cephalic portion of occiput; or armed tiuM-e 



*^ It appears more than probable that the female described as Bostra 

 similis by Rcdtenbacher, from Mexico, represents that sex of jaliscensis. 

 Insektenfamilie der Phasmiden, p. 412, (1908). 



TRANS. AM. ENT. SOC, XLVIII. 



