Sept., 1909.] Hayhurst : Two Species of Hyalopterus. 115 



Winged viale. 



Third joint of antenna with about 80 sensoria, V with 5 sensoria towards apex 

 (Fig. 4, a)\ eyes black, beak just passing anterior margin of mesosternum. Abdomen 

 yellowish, the large quadrate dusky area of the winged vivipara represented by three 

 broad transverse dusky bars ; cauda, Fig. 7. Otherwise as in winged vivipara. 



Measurements: Length of body (less cauda) 1.305 ; antennce (Ill-filament in- 

 clusive) 1.55; III .688; IV .258; V. 241; VI (scape) .155; filament .206; forewing 

 2.61 ; cornicle .069 ; cauda .12. 



One specimen, apparently of this species, from rose, September 29. 



This male is exceptional among plant lice in having no more sen- 

 soria on joint III than in the winged vivipara, but this female has so 

 many sensoria that the male could hardly bear any more. 



Hyaloptfcrus dactylidis, new species. 



Winged vivipara: Head (Fig. 12) light yellow; antennae (Fig. 14) I-II and 

 base of III concolorous ; elsewhere brownish or black ; III with 11-15 sensoria in a 

 nearly straight row on posterior aspect, not on tubercles ; each posterior ocellus 

 bounded mesally with a heavy black border, a dusky or black area mesal and behind 

 each posterior ocellus ; compound eyes dark or blackish red ; beak barely attaining 

 middle of anterior pair of mesosternal plates. Prothoracic lateral tubercle absent ; 

 prothorax light yellow, mesothorax deeper yellow (lemon cadmium), prescutum, 

 scuta! lobes, lateral and sternal plates brownish yellow, scutellum and postscutellum 

 yellow, the posterior apex of the latter dusky or black; forewing (Fig. 10) with 

 third discoidal extremely variable (Fig. 10, a-J^ ; veins slender ; femora pale yellow- 

 ish green, tibiae light brown, the apex dusky, tarsi dusky. Abdomen pale greenish 

 or yellowish green without maculations; without lateral tubercles, cornicles (Fig. 13, 

 a, F) concolorous, or paler than the abdomen, broader at the base than at the apex, 

 or cylindrical ; cauda (Fig. 11 ) light yellow with three or four pairs of lateral setae. 



Measurements : Length of body (less cauda) 1.688 mm. (1. 52-1. 78) ; width of 

 abdomen .50 (.478-.522) ; antennae (base of Ill-filament inclusive) 1.385; III 

 .446 (.395-516) ; IV .234 (.206-. 258); V .244 (.206-.275); VI (scape) .138; fila- 

 ment .323 (.292-. 378) ; forewing 2.914 (2.827-3.132) ; cornicle .079 ; cauda .199 

 (. 1 89-. 206). 



U'ingiess vivipara : Head, Fig. 9 ; antennae I-II concolorous, Ill-V translucent 

 yellowish, VI including filament dusky to black, 3-4 sensoria on or near posterior 

 aspect of III, rarely I, 2, 5 or none (Fig. 14, a). Prothorax, Fig. 9. Entire thorax 

 yellow (pale lemon chrome or lemon cadmium) or the meso- and metathorax greenish 

 yellow or yellowish green ; tibiae pale yellowish or greenish yellow with apex slightly 

 dusky. Abdomen unicolorous with meta- and mesothorax. Entire body without 

 maculations. Cauda stouter, apex broader than in winged vivipara. Elsewhere 

 as in winged vivipara. 



Measurements: Length of body (less cauda) 2. 081 mm. (1.784-2.392) ; great- 

 est width of abdomen (segments 1-4 about same diameter) .783 (.696-.870) ; anten- 

 nae (Ill-filament inclusive) 1.06; III .324 (.292-.361) ; IV. 161 (.138-.172); V 

 .177 (.138-.189); VI (scape) .117 (.103-.120); filament .281 (.223-327); cor- 

 nicle .086 ; Cauda .238 (.206-.275). 



Types No. 12322. U. S. National Museum. Type locality, 

 Forest Hills, Mass. 



