A new species of Stenorrhachus McLachlan from Chile (Neuroptera: Nemopteridae) with biological notes Author Miller, Robert B. Author Stange, Lionel A. text Insecta Mundi 2012 2012-04-06 2012 226 1 8 journal article 10.5281/zenodo.5174180 1942-1354 5174180 Stenorrhachus chilensis Miller and Stange , new species ( Figures 1-9 ) Holotype male. 16 km . south Vallenar , Antofagasta , Chile , 1000 m ., 10.II.1989 , R . Miller & L. Stange ( FSCA ). Diagnosis . Labial palpus about as long as maxillary palpus, basal segment about 1.5 times longer than greatest diameter, second segment with small apical setae; postventral lobe of male ectoproct about as long as greatest diameter; male paramere about eight times longer than greatest width; mediuncus nearly straight at middle, then bent strongly backwards at lateral margin with a large latero-dorsal process near angle. Figures 1-9. Stenorrhachus chilensis Miller and Stange , male. 1) Face. 2) Head and thorax, dorsal view. 3) Whole body. 4-5) Head and thorax, dorsal and lateral view. 6) Forewing. 7) Terminalia, posterior view. 8-9) Genitalia, dorsal and caudal view. Description. Holotype male: length of body 12 mm , forewing 24 mm ., greatest width 10 mm . hindwing 59 mm . Coloration : general coloration light brown to pale yellow; face ( Figure 1 ) mostly pale yellowish ventrally becoming darker dorsally; scape and petiole mostly pale yellow with small dark brown ring apically; antennal flagellomeres brown with very narrow pale ring apically; vertex ( Figure 2 ) mostly pale yellow with dark brown anterior row and posterior row connected with narrow dark brown stripe medially; large black area behind antennal sockets; pronotum ( Figure 4 ) without definite markings, mostly dark brown with some pale yellow and with brown spots at base of most setae; mesonotum mostly dark brown anteriorly and laterally, pale yellow in middle before scutellum which has a large brown median area and has pale yellow brown spots at base of many setae; pleura straw colored, mottled with darker brown; legs ( Figure 5 ) mostly pale brown with coxae mostly dark brown except apically; femur with considerable dark brown anteriorly, tibia with small subbasal and apical dark brown rings; tarsi pale brown; pretarsal claws dark brown; abdomen ( Figure 3 ) predominately dark brown except for terminal segments which are mostly pale brown dorsally, dark brown spots at many setal bases; wings ( Figure 6 ) translucent except some brownish suffusion in costal and subcostal area; wing veins and crossveins uniformly dark brown. Chaetotaxy : all setae on body and wings dark brown; leg setae short, shorter than diameter of leg; conspicuous setae present on pronotum, pteronotum, abdomen, and longest on terminalia ( Figure 8 ). Structure : labial palpus about as long as maxillary palpus, basal segment about 1.5 times longer than greatest diameter, second segment with small apical setae; antenna with about 45 flagellomeres which are mostly about twice as long as broad; head ( Figure 1 ) with interocular distance about twice as long as vertical distance from labrum to vertex; pronotum ( Figure 4 ) much wider posteriorly than anteriorly; abdomen short, about as long as length of head and thorax together; forewing venation ( Figure 8 ); hindwing elongate, ribbon-like, not expanded posteriorly; genital capsule (tergites IX to XI) enlarged, much wider than rest of abdomen; sternite IX reaching to posterior margin of postventral lobe of ectoproct which is about as long as greatest diameter; paramere about eight times longer than greatest width ( Figure 9 ); mediuncus nearly straight at middle, then bent strongly backwards at lateral margin with large broad latero-dorsal process near angle ( Figure 8 ). Variation : length of body 7 to 12 mm ., forewing 15 to 24 mm ., hindwing 42 to 60 mm . Paratypes . 25 males . February. CHILE . Antofagasta : 16 km . south Vallenar , 1000 m ., 10.II.1989 , R . Miller & L. Stange (at light) ( 20 m , 23f, CASC ; FSCA ; PCRM ; TAMU; USMB ). Coquimbo : Vicuña, 9.II.1989 , R . Miller & L. Stange ( 2m , FSCA ) . Discussion. This species differs notably from S. walkeri in the shorter male ectoproct (postventral lobe about as long as greatest diameter) and male genitalia ( Figures 8, 9 ) which has the anterior fragment of the male paramere longer and more slender and the gonarcus which has a broad latero-dorsal process near the strong posterior angle. S. chilensis appears to be somewhat smaller (forewing 15 to 24 mm ) than S. walkeri (forewing 23 to 27 mm ) and has darker markings. Also, the labial palpus and pretarsal claws are shorter and the male abdomen of S. chilensis is slightly longer than in S. walkeri . This species occurs at high elevation (1000 meters) whereas S. walkeri appears to prefer the coastal sand dunes.