PHASMIDjE. monandroptera. 



79 



styles ; the three terminal ventral segments are consider- 

 ably swollen. The fore legs are wanting ; the middle and 

 hind ones are long and slender ; the middle tibiae with a 

 small spine near the base, both on the outer and inner 

 edges, also a similar spine on the outer edge of the left 

 tibia, that on the opposite side wanting the spine. Tarsi 

 with the basal joint very long. 



Plate XIII. Fig. 1. The male, of the natural size, 

 teimiual segments seen laterally. 



1 a. The 



19. (204.) Phibalosoma Ploiaria, Jf'estw. 

 Plate XIII. fig. 4, male. 



Gracillimum, cylindricum, filiforme, virescenti-fuscum, 

 laeve ; antenuis pedibusque rufo-brunneis ; mesothorace 

 valde elongate ; alls fusco vix tinctis, area costali obscuriori ; 

 tegminibus fuscis, margine antico albo ; pedibus longissimis, 

 gracilibus. 



Long. Corp. uuc. 4^ ; cap. lin. 2; proth. lin. l^; me- 

 soth. lin. 14 ; metath. hn. 10 ; abdom. lin. 23 + lin. 4 = 

 lin. 27 ; tegm. lin. 2 ; alee, lin. 15 ; alar, expans. unc. 2^. 



Hab. lu plagis occid. Amer. Septentrion. B.M. 



The great length of the mesothorax and its very slen- 

 der proportions render this a very conspicuous species, of 

 which, however, 1 am only acquainted with the single male 

 represented in the accompanying figure. It is very long 

 and slender, destitute of spines, smooth, of a greenish- 

 brown colour, with the antennae and legs red-brown. The 

 head is wide, with two very small conical tubercles between 

 the eyes, and a small circular impression behind the clypeus ; 

 it is fulvous-coloured. Eyes very prominent. Antennse 

 long, filiform ; the joints scarcely distinguishable and very 

 numerous, rather long in the middle and short towards the 

 tips. Mesothorax very long and filiform. Tegmina small, 

 rather oblong, with the carina strongly elevated towards the 

 base, brown, with the anterior margin white. Wings mo- 

 derate-sized, slightly stained with dusky ; costal area 

 browner. Abdomen long and slender ; the seventh and 

 eighth joints widest ; the ninth square, subtruncate behind, 

 with a raised semicircular space towards the extremity ; a 

 white spot on each side of the eighth segment, and the 

 upper side of the ninth also white ; terminal ventral seg- 

 ments abbreviated and very much swollen, scarcely extend- 

 ing beyond the extremity of the eighth dorsal segment ; 

 anal styles curved, obtuse, not extending beyond the extre- 

 mity of the ninth dorsal segment, the under surface of 

 which is set with numerous short paints. Legs long, 

 slender, and simple ; basal joint of the tarsi more than half 

 the length of the entire tarsus. 



Plate XIII. Fig. 4. The male, of the natural size. 4 a. Ter- 

 minal segments of the abdomen seen laterally. 4 b. The 

 same seen from beneath. 4 c. The terminal segment seen 

 from above. 



Genus 15. MONANDROPTERA, Serville. 



Male with moderate-sized oval tegmina and large wings. 



Female apterous. 



Male long, slender, cylindrical, with the metathorax 

 dilated and spined along the sides. 



Female broad, depressed. 



Antennse of moderate length. Ocelli obsolete. Meta- 

 thorax nearly as long as the mesothorax. Legs robust ; 

 hind legs strongly spined ; basal joint of the tarsi short. 



Burmeister, in his Revision of the Order in Germar's 

 ' Zeitschrift ' (ii. p. 41), and De Haan (p. 131), have re- 

 ferred this genus to Cladoxenis, Serv. (Phibalosoma, supr.), 

 evidently, however, without having had an opportunity of 

 seeing the insects in nature ; the former, at least, had failed 

 to recognize the species, as I found the male in the Berlin 

 Museum, described by him under the name of Cijjihocrania 

 acanthomera ; thus proving, in effect, its generic distinction 

 from Cladoxenis, and its much closer affinity to Cypho- 

 crania. 



The fine female insect figured by me in the ' Arcana En- 

 tomologica,' pi. 49, is so closely allied to the female of M. 

 inuncans, that I do not hesitate to refer it to the genus, 

 although it possesses extremely minute rudimental teg- 

 mina ; as is also the case with the insect in the Berlin Mu- 

 seum from the coast of Africa, described below under the 

 name of M. parallela. 



It is with much greater doubt that I refer the large 

 apterous Brazilian female insect, also figured in my ' Ar- 

 cana,' ii. pi. Gl (D. gibbosa, Burm.), to this genus : not 

 only its geographical range, but also its unarmed legs 

 and peculiar-shaped thorax separate it from the Old World 

 species. 



1. (205.) Monandroptera immcans. 

 Mas. Filiformis, virescens ; capite la.'vi, postice hneis 

 6 nigris ; mesothorace laevi, prothorace triplo longiori ; 

 tegminibus ovalibus mesothorace paullo longioribus, griseo- 

 viridibus, costa lata albida ; alls fere abdominis longitudine 

 hyalinis brmineo maculatis, costa subopaca rufo-brunnea 

 basi nigra ; metasterno macula rotunda nigra nitida notato ; 

 pedibus corpore coucoloribus, anticis longioribus simpli- 

 cibus ; femoribus intermediis ad apicem spinis nonnullis, 

 posticis subtus fortiter spinosis, tibiisque 2 posticis subtus 

 spinosis. 



