Deraeocoris (Heteroptera, AIiridae) 125 



white wax-coated nymphs frequent the aphid-curled leaves, feeding on 

 the aphids and honeydew excretions. The hugs were never ohserved 

 to feed on the fruit and it seems to the writer that the species is likely 

 to prove heneficial rather than injurious. The species was also taken 

 on Crataegus, where it was found associated with and predaceous upon 

 Schi:::oiicitr(i cratacgi Oestlund. I^r. W . H. Wellhouse reared a speci- 

 men from the time of hatching" to the adult stage on the foliage of 

 Crataegus, altho in rearing other specimens he' found that aphids were 

 fed upon when available. The young nvmphs appeared with the un- 

 folding of the buds, doubtless hatching from eggs which passed the 

 winter in the buds or twigs. Prof. L. Caesar found fasciohts rather 

 abiuidant on apple and pear trees in C)ntario but as yet has not ob- 

 served it feeding on the fruit. 



For a considerable period the writer had considered this species 

 as merely a variety of borcalis but a close examination of the genital 

 claspers revealed the fact that fascioliis is structurally distinct, a point 

 first suggested after observing the habits of these insects. 



Deraeocoris fasciolus castus new \ariety 



Apparenth- only a color form of fasciolus but at least a well defined and 

 stable color variety ; dorsum f ulvo-testaceous, calli usually lined with black 

 but sometimes entirely brownish. 



S. Length 6 mm. FIcad: width 1.08 mm., vertex .51 mm., length .57 

 mm. ; fulvo-testaceous or brownish, basal spot and geminate mark on basal 

 lialf of tylus, spot beneath eye. dorsal margin of lorae, mark on bucculae and 

 tip of tylus, blackish. RostruDi', length 2.28 mm., nearly attaining the posterior 

 margins of middle coxae, yellowish brown, the apex darker. 



Auicnuac: segment I, length .57 mm., yellowish, becoming infuscated on 

 basal half; II, 1.71 mm., pale yellowish, becoming infuscated at apex; III, .68 

 mm. ; IV. .46 mm. ; last two segments yellowish or becoming dusky. 



Prouofiiin : length 1.45 mm., width at base 2.39 mm., anterior angles .92 

 mm., collar .74 mm. ; uniformly fulvo-testaceous or brownish, calli lined with 

 black, sometimes entirely brownish. SciifcIIuiii fulvo-testaceous, basal angles 

 narrowly and sometimes the apex pale. Stcrinait uniformly brownish; ostiolar 

 peritreme pale yellowish, fusco-brownish dorsally. 



Hciiich'tra : width 2.85 mm. ; uniformly fulvo-testaceous or brownish, em- 

 bolium pale translucent, punctures black. Ciinnis pale translucent, punctures 

 not evident, fusco-brownish on the inner margin at apex. Mciiibraiic with a 

 rounded fusco-brownish spot on apical half, sometimes produced basally in a 

 ray Iietween the larger areoles, brachium and invading tlie membrane either 

 side fusco-brownish, in darker forms the areoles also clouded. 



Legs : pale yellowish to brownish, sometimes the hind' femora with two 

 fuscous bands near apices ; tibiae pale or with only a spot at knee ; tarsi dark- 

 ened at apices, claws brownish translucent. 



