20 



CATALOGUE OF ORTIIOPTEROUS INSECTS. 



The entire body is glossy black and smooth, the fore 

 femora alone being dirty buff at the base ; the body be- 

 neath is smooth and polished, with tlie joints simple. The 

 head is oval, convex, polished and smooth, with two small 

 impressions in front of the crown. The antennse are short, 

 16-jointed, tlie basal joint small, the second square, the 

 remainder oblong and setose. The prothorax is widest 

 behind the middle. The mesothorax is constricted at its 

 base, rather dilated before the middle, narrowed again 

 behind the middle, and dilated at its hind part ; the swollen 

 anterior part bears a large oval raised tubercle. The meta- 

 thorax is more than half the length of the mesothorax, 

 dilated behind the middle, where, as well as near the base, 

 it is furnished with a raised transverse ridge. The abdo- 

 men is long and rather slender, the fourth segment being 

 the narrowest, whence it is gradually dilated to the eighth 

 joint, which is swollen at its sides ; the ninth joint being 

 considerably narrower, shorter, and deeply notched, the 

 two divisions of the notch being deflexed ; the ninth ven- 

 tral segment is also swollen beneath, and notched at its 

 extremity, which does not extend to the extremity of the 

 dorsal surface ; the basal segments are transversely swollen 

 across the hind part, and the hind ones are marked with 

 longitudinal impressions. The legs are very long and 

 slender, the fore femora but slightly curved at the base, 

 and all the femora finely serrated from the middle to the 

 extremity on the under side. 



Plate I. Fig. 6. The male, of the natural size. 6 a. The head, 

 thorax, and first abdominal segment seen laterally. 6 b. 

 The four terminal segments of the abdomen seen laterally. 



I am induced to place this insect in the present genus 

 on account of its uniform black colour and polished sur- 

 face. It ill accords, however, with the preceding species, 

 owing to the great length of its legs and the nodose struc- 

 ture of its thoracic segments. 



Genus 4. DIAPHEROMERA. 



Diapheromera, G. R. Gray, Serville. 

 Bacteria, p., Burmeister, De Haan. 



Body elongate ; that of the male cylindric, that of the 

 female broader and somewhat thickened. Thorax long, gla- 

 brous. Abdomen shorter than the thorax. Legs Ion"; 

 intermediate femora in the male thickened and spined, in 

 the female slender and simple. Antennas elongated. 



1. (51.) Diapheromera Sayi. 



Viridescenti-brunnea ; capite flavescenti fasciis tribus 

 fuscis ; femoribus anticis viridibus, iutermediis in mare 



crassis, flavo-brunneis, fusco-annulatis, quatuor posticia 



subtus juxta apicem spina picea acuta armatis. Foemina 



paullum iucrassata, cinerea, robusta ; pedibus gracilibus, 



quatuor posticis spinosis. 



Long. corp. mas et foera. 2" 9'" ; anten. mas, 2" 9'" ; 



fcem. 1" 9'". 



Spectrum femoratum. Say, Amer. Eat. iii. pi. 37. 

 Diapheromera Sayi, G. R. Gray, Syn. Phasm. jj. 18. 



Semite, II. N. Orth. p. 247. 



Burmeister, Handl). J. Eat. ii. 2. .')CG. 



De Haan, Orth. Orient, p. 134 (Bacteria, sp.). 



Hab. In America septentrionali. B.M. 



2. (52.) Diapheromera calcarata. 



Femoribus concoloribus ; posticis 4 subtus ante apicem 

 spiua armatis ; spinis mediorum crassioribus et longioribus 

 (mas) . 



Long. corp. 2" 9'". 



Bacteria (Bacunculus) calcarata, Burmeister, Ilandb. d. 

 Ent. ii. p. 566. 



Be Haan, Orth. Orient, p. 134. 



Hab. In Mexico. 



Genus 5. BACTERIA, 



Bacteria, Latreille, Serville, G. It. Gray, De Haan, Bur- 

 meister. 



Body apterous in both sexes, that of the male slender, 

 filiform, of the female more robust, cylindric. Head small, 

 sometimes cornuted. Antennae long, setaceous. Thorax 

 smooth, or but slightly rugose, nearly as long as the abdo- 

 men. Abdomen of moderate length, or long ; glabrous. 

 Legs long, equal in length in the opposite sexes, simple, 

 and without membranous lobes to the thighs ; basal joint 

 of the tarsi sometimes dilated, erect, longer than the three 

 following. 



1. (53.) Bacteria Calamus. 

 " FiUformis, cyliudrica, aptera, virescens ; antennis seta- 

 ceis, flavesceutibus ; capite teve, glabro, flavescenti, cor- 

 pore magis obscuro ; pedibus flavesceutibus ; femoribus 

 Uneis elevatis striatis." {Fabr.) 



Mantis Calamus, Fabricius, Ent. Syst. ii. p. 13 ; Ent. Syst. 

 Suppl. p. 187 (Phasma Cal.). 



Serville, Ann. Sci. Nat. xxii. p. 64 (Bacteria Cal.). 



G. It. Gray, Syn. Phasm. p. 17 (ibid.). 



Bvrm. Ilandb. d. Ent. ii. 2. p. 564 (ibid. fcem.). 



Lichtenstein in Linn. Trans, vi. p. 10. 



Latreille, Gen. Crust, et Ins. iii. p. 88. 



Lamarck, An. s. Vert. iv. 255 (Spectrum Cal.). 

 Hub. In Insula SanctseCrucis (J'rtir.); Surinam, Brazil 

 {Barm.). l^.M. 



