240 
Psyche 
[September 
margin for a long distance, with 12-15 pectinate branches; no trace 
of CuP visible; cu-ia crossvein moderately long, sinuous. 
This genus differs from all known berothids in the absence of any 
trace of fusion of the 9th tergite and ectoprocts, the possession of a 
recurrent humeral vein in only the forewing, and in the ventrally 
extended head capsule and correlated attenuate mouthparts. 
We take pleasure in naming the type species after its collector, the 
prominent Chilean naturalist, Luis E. Pena. 
Cyrenoberotha penai new species 
Head: anterior tentorial pits prominent; labrum about 2/3 as 
long as broad, rest of head brown; face and vertex with white setae, 
those on vertex curved forward. Antennae : fossae widely separated, 
located high on face; scape short, pedicel as long as 2 flagellar seg- 
ments, flagellum dark; flagellar segments 35 in male, 31-34 in female, 
shorter in female than in male ; setae white, not in definite whorls. 
Pronotum longer than wide (mean total length, cf — 0.48, $ — 
0.60; midline length, cf — 0.40, $ — 0.43; width, cf — 0.40, 9 — 
0.48 mm) ; not especially robust, brown with paler anterior median 
stripe ; with erect white setae ( fig. 1 ) . 
Preseuta pale posteriorly; scuta pale in middle third; scutella. pale 
along anterolateral margins (fig. 1). Anterior cervical sclerite 
straight, stiff, slender; 1.8 times as long as posterior cervical in male; 
2.5 times as long in female. Pleurae brown. 
Legs slender, tibiae pale at middle; tarsi' pale basally. Leg setae 
mostly pale, inclined at about 45 °, length at most about twice leg 
diameter. No tibial spurs. The 4 basal tarsomeres each with a pair 
of stout setae, on apicolateral corners of plantar surface. Claws 
slender, strongly curved, without teeth; arolium small. 
Wings: membrane transparent, without markings; veins uniform- 
ly brown-fuscous. Forewing — costal area slightly broadened at base; 
middle costal veinlets with 2 or 3 branches ; apical veinlets not forked ; 
R dips posteriorly at apex ; Rs 4-5 branched ; MA forks near margin ; 
4-5 outer gradates. A thyridium at intersection of ma-mp crossvein 
with MPi. Hindwing — costal area narrow; 2-4 outer gradates. 
Setae on dorsal surface of forewing erect, dark; near wing base, 
about twice as long as average distance between veins; shorter apical- 
ly; on ventral surface and both surfaces of hindwing, setae shorter, 
directed basally at about 75 0 to long axis of vein. Posterior margin 
of both wings basally fringed with long, straight, white setae. 
Abdomen : brown, unmarked ; setae mostly pale, those on mem- 
branous areas with prominent dark bases. Male (figs. 7, 8, 9) : apex 
