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PROCEEDINGS OF THE NATIONAL MUSEUM. 



VOL. XXVII. 



diary segment of the adult female as well as the nymphs is scarcely 

 longer than the metanotum. The long-winged male insect as figured 



by Westwood seems also to have the interme- 

 diary segment subequal with the metanotum. 

 The adult female, which has never been 

 described, is shining brown above, yellowi.sh 

 below, the margins of the pronotum and elytra 

 and the center of the dorsal surface of the 

 intermediary segment longitudinally marked 

 with chalky white, probably a variable charac- 

 ter. The head (fig. 2) has the usual horn-like 

 tubercles, the right one fully twice as large as 

 the one on the left. Behind these main tu- 

 bercles is a pair of smaller ones, likewise dis- 

 similar in size. The pronotum is transversely 

 divided mesially b}' a deep sulcus and the 

 anterior lobe is divided longitudinally by a 

 narrow sulcus and bears a pair of stout black- 

 tipped sharp spine-like tubercles. The me- 

 sonotura bears ten irregularl}- placed, black- 

 tipped spines or sharp tubercles. The eh^tra 

 are about as long as the metanotum, the wings 

 about the same length, though the}' project a 

 millimeter beyond the tip of the elytra, being- 

 placed farther back. The abdominal segments 

 are about three times as leng as broad and are 

 apically furnished with a slight crescent-shaped 

 transverse blunt carina. The tip of the ab- 

 domen and the antenna^ are gone but are 

 drawn in dotted lines from the large nymph 

 as a model. The legs are slight!}' lighter 

 colored above than the body, below concolor- 

 ous with the ventral portion of the body, 

 unarmed except that the posterior and inter- 

 mediate femora are armed l)elow on the outer 

 two-thirds with a few large black-tipped spines, 

 the tip of the tibiae l)elow also furnished with 

 an elevated longitudinal ridge. 



Length. HO-fmrn. ; pronotum, 4.75 mm. ; rae- 

 sonotum, 19.5 mm. ; metanotum, 6 mm. ; inter- 

 mediar}' segment, 6.5 mm.; anterior femora, 

 19 mm.; intermediate femora, 15.5 mm.; pos- 

 width of head, 3.5 mm.; pronotum, 3.5 mm.; 

 first abdominal segment, 3 mm. 



! 



Fig. 1.— Haploplus evadne, 

 female (enlarged). 



terior femora, 21 mm. 

 mesonotum, 2.5 mm. 



