84 burmeister's odonata. 



57. Libelliila steiniiialis B. P. 857. [Orthetnm.] 



testacea fusco-vittata, fascia frontis media nigra ; abdomine fusco, 

 segmentis 1-6 fascia lata testacea ; alee hyalinse, venis stigmatibusque 

 nigris. Long-. IJ". 



Von Isle de France, in v. Winthem's Sammlung-. 



One male in the M. C. Z. witli the pin-lal)e]s " Winthern" (printed), 

 " L. steiualis * Burin. Isle de France" (written). A description 

 follows : 



% (typel. Vertex blackish in front, olive bebinrl, tip distinctly bifid, apices 

 acute. Anterior surface of the frons above the horizontal carina blackish, be- 

 coming brownish on the sides, and iinitinii; with a narrow black stripe in front 

 of the vertex and antennte. leaving a yellow spot on the- superior surface of the 

 frons surrounded by tlie black ; below the hoi-izontal carina the frons is pale 

 olive, as is the nasus: rhinariuni darker. Lips yellow, labrum with its free 

 margin edged with black and a small triangular blackish spot at the middle of 

 the basal margin which reaches half-way towards the free margin ; middle lobe 

 and the inner (niesal) margius of the lateral lobes of the labium black. Occiiiut 

 yellow behind, obscurer above. Rear of eyes dark brown above (enclosing two 

 yellow spots), yellow below. 



Anterior and middle prothoracic lobes dark brown, their anterior margins and 

 a median, basal, dorsal spot yellow. Posterior lobe of almost equal width with 

 the n)iddle lobe, yellow, hind margin entire. 



Thorax greenish-Iuteous with the following dark brown markings: two ante- 

 humeral stripes which do not, and a humeral stripe which does, reach the wing 

 base above, a narrow (metepisternal) stripe at the spiracle and a broader (mese- 

 pimeral) one in front of it, these two ill-defined, especially in their upper halves, 

 a stripe on the second lateral suture and an ill-defined one (metepimeral) parallel 

 to and behind it. The free greenish-Iuteous area on the thoracic dorsum between 

 the first antehumeral strii)es of each side measures 3 mm. in width ; the second 

 antebumeral stripe is united below with the humeral, and both antehumerals, 

 the humeral and the mesepimeral are connected at their lower ends, as also the 

 first antehumeral at its lower end with dark brown on the anterior mesothoracic 

 border. Latero-ventral metathoracic carina black. 



Feet luteous. apices of all the femora, inferior surfaces of the second and third 

 femora, inferior surfaces of all and superior surfaces of third tibiae, tarsi, blackish. 

 Hind tibiae with outer (anterior) row of 7 spines, inner (jiosterior) row of 11-12 

 spines. 



Predominant color of abdominal segments 13 ochre, 1 and base of 2 with black 

 on each side of dorsum (enclosing an elliptical ochreous spot) and continued as a 

 lateral brown band on each side of 2 and 3 ; carinse of 2 and 3 with black stripes 

 and apex of 3 black; 4-10 predominantly black, 4 with a small ochrectus spot 

 each side at base, 4-6 with a median ochreous spot each side of dorsum, 4-9 with 

 a ventral ochreous spot occupying the middle of the segments. 



Viewed from above the abdomen (whose shape seems well preserved) is widest 

 at 2 (3 mm.), narrowest at base of 4 (1.25 mm.), widens to apex of 6 (2.6 mm.). 

 narrows to 10 (1.6 mm.) ; the base is strongly compressed. 



Superior appendages as long as 9, luteous, brownish at base, apex and ventral 

 surface of the usual form in Oithetrum, with seven denticles below. Inferior 



