Deraeocoris (Heteroptera, Miridae) 137 



least are rather inconspicuous, as they hve among the aphids and 

 their excretionary products. The eggs are doubtless deposited during 

 July in the twigs or Inids, where they pass the winter, and upon hatch- 

 ing in the spring the young nymphs seek out the aphid-infested leaves 

 very soon after the leaves are curled. In the writer's experience 

 aphidiplmgus was found closely associated only with Schisoneura amer- 

 icana but extended observations may show that other elm aphids are 

 fed upon when the preferred species is not to be had. 



Mr. Van Duzee writes that this species is the form which Renter 

 (1909) took to be Cmnptobrochis grandis Uhler and that he also has 

 looked upon aphidiphagus as representing that species. The writer 

 would call attention to the fact that until the present time the refer- 

 ences to grandis Uhler refer to a group of species, as witnessed by 

 numerous determinations examined, and should be accepted only with 

 this in mind. 



Deraeocoris triannulipes new^ species 



Closely related to aphidiphagus but darker colored and the paler parts 

 stained with brownish ; genital claspers distinctive, the internal arm of the 

 left clasper very different from that in aphidiphagus. 



$. Length 6.4 mm. Head: width 1.06 mm., vertex .54 mm., length .62 

 mm. : very similar to aphidiphagus but more broadly blackish at base of tylus 

 and lower part of front, also blackish along front margin of eyes. Rostrum. 

 length 1.99 mm., reaching to middle of intermediate coxae, yellowish brown, 

 darker at apex. 



Antennae : segment I, length .45 mm., fuscous to blackish; II, 1.51 mm., 

 m.ore slender on the basal half, the apical half scarcely equaling the thickness 

 of segment I, pale pubescent, the length of a few exserted hairs slightly ex- 

 ceeding the thickness of segment, brownish black, paler on the basal one-third ; 

 III, .68 mm. ; IV, .6 mm. ; last two segments slender, brownish black, segment 

 III paler at base. 



Pronotuin: length 1.34 mm., width at base 2.42 mm., anterior angles 1.03 

 mm., collar .8 mm. ; uniformly brownish black, basal and lateral margins slen- 

 derly pale, brownish at the median line before the calli ; xyphus and lower 

 margins of propleura pale, fuscous mark each side at anterior angles of xyphus. 

 Scutellum brownish black, basal angles, apex and a slight indication on median 

 line pale; mesoscutum dark brownish. Sternum and pleura dark brownish black, 

 basalar plate slightly paler; ostiolar peritreme pale, slightly darkened at dorsal 

 margin. 



Heviclytra : width 2.85 mm., nearly as in aphidiplmgus; brownish black, 

 basal half of embolium, spot at base of corium, and more or less on clavus, 

 pale brownish translucent, the paler parts distinctly stained with brownish. 

 Cuneus brownish black, more or less pale translucent at middle, the punctures 

 dark. Membrane pale brownish or fumate, veins slightlj- darker, basal half of 

 the larger areole and a spot at each side by apex of cuneus paler. 



