759 



REPORT ON THE 



ORTHOPTERA OF MESOPOTAMIA AND PERSIA. 



Collected by 



Messes. P. A. Buxton, M. A., and W. E. Evans, B. So. 



DICTYOPTERA AND EN8IFERA. 



BY 



L. CHOPARD, D.Sc. 

 ( With three plates.) 



DICTYOPTERA. 

 Fam. - BLATTID^. 



Gen. — I8CHNOPTERA, BURM. 



Ischnoptera evansi, n. sp. 

 (Fig. 1 and 2). 



Ti/pe : — One female from Mesopotamia, Amara (at light, W. E. Evans 

 7-8-1918). 



A small species for the genus, of a rather pale, very uniform testaceous colour. 

 Head testaceous, the vertex exposed ; face darkened between the eyes, which 

 are widely separated ; no ocellar spots visible. Antennae testaceous, darker 

 in the distal part. Maxillary palpi yellowish, the 4th joint shorter than the 

 3rd, much dilated at the apex, 5th joint long, brown at the apex which is acute. 

 Pronotum testaceous, translucent laterally ; anterior and lateral margins 

 rounded, posterior margin slightly produced in the middle. Meso and 

 metanotum testaceous with a small fuscous mark on each side. Abdomen 

 testaceous with two lateral fuscous bands ; supraanal plate translucent, slightly 

 triangularly produced ; subgenital plate broad, almost truncate at the apex. 



Legs concolorous ; front femora armed beneath on the outer edge with 5 or 6 

 spines subequal in length, rather strong, one of which is apical, on the inner 

 edge, from base to apex, with 4 moderately strong spines, 10 very small ones, 

 1 rather large and 2 very long apical ones ; tibiae short, armed with 5 apical 

 spurs, 3 superior (1 ext., 2 int.) and 2 inferior spines (1 ext., 1 int.) ; tarsi short, 

 the 3 first joints spiny beneath, presenting two minute lateral spines at the apex, 

 4th joint very sh jrt, 5th almost as long as the metatarsus ; aroMa between the 

 claws large. Intermediate and posterior femora armed with two internal apical 

 spurs and 6 or 7 spines on each inferior margin ; intermediate tibite armed 

 with 5 apical spurs, 7 superior (2 ext., 3 med., 2 int.) and 6 inferior spines (3 

 ext., 3 int.) ; posterior tibite with 5 apical spurs, 13 superior (4 ext., 4 med., 5 int.), 

 and 9 inferior spines (4 ext., 5 int.) ; posterior tarsi longer than those of the two 

 other pairs. 



Elytra and wings extending little beyond the apex of abdomen. Elytra 

 very pale testaceous, almost transparent ; marginal field broad, occupying 

 more than the third of the total width of the tegmen ; 8 costal veins ; humeral 

 vein furcate after the 8th costal, its superior sector giving 10 branches ; the 

 inferior one furcate at the apex ; median vein trifurcate at its base ; ulnar 

 vein forming 4 branches, parallel, somewhat angled near their base. Wings 

 hyahne ; mediastinal vein furcate at the apex ; humeral vein furcate little after 

 the middle, having given 4 branches, its superior sector giving 5 more parallel 

 branches, the inferior trifurcate at the apex ; median vein very sHghtly sinuate ; 

 ulnar vein giving 3 branches towards the apex of the wing and 3 short ones to 

 the dividing vein ; axiUary vein trifurcate. 



Length of body, 13 mm. ; length of pronot., 3*5 mm.; width of pronot., 5 mm.; 

 length of tegmen, 12*7 mm. 



