Schizochelus modestus Philippi

Schizochelus modestus Philippi third instar ( Figs. 15–28 View Figs View Figs )

The description is based on 10 larvae that were reared from eggs laid by adults collected in flight in pastures near Puerto Varas, S41°23′ W73°00′, at 91 m elevation, and were collected from locations including Osorno, Río Bueno, Ranco, and Puyehue, all located in the Región de Los Lagos and Región de Los Ríos.

Description. C-shaped. Width of head capsule L 3: 1.67 ± 0.08 mm ( n = 10). Without ocellus. Cranium ( Fig. 15 View Figs ): Smooth, shiny, light yellow; frontal suture whitish, bisinuate, forming a sharp angle at joint; epicranial suture 1/3 length of frontal suture; 2 dorsoepicranial setae; 2 frontal anterior and 2 frontal posterior setae; 1 seta adjacent to antennal socket; 6–7 long setae adjacent to lateral antennal socket (viewed from the front). Antenna ( Fig. 16 View Figs ): With four antennomeres. Apical antennomere with 1 dorsal sensory spot and 2 ventral sensory spots. Second antennomere 1.8X as long as first antennomere. Third antennomere with elongate process with 1 ventral sensory spot. Clypeus ( Fig. 15 View Figs ): Trapezoidal. Surface of preclypeus smooth, without setae. Smooth postclypeus with 2 lateral setae, 1 very long and 1 mediumlength, and 2 clypeal setae. Labrum ( Fig. 15 View Figs ): Pentagonal, symmetrical, trilobed, apical lobe with pair of blunt setae; with 2 posterior setae, 4 medial setae, and 2 setae on the anterior margin. Epipharynx ( Fig. 17 View Figs ): Pentagonal. Plegmatia, proplegmatium, epizygum, and zygum absent. Corypha with 2 blunt setae. Clithrum present. Haptomerum with 5–7 sensilla and 3–4 heli in a transverse row. Acroparia with long, thick setae. Acanthoparia with 5–7 sickle-shaped, short posterior setae and 3 straight anterior setae. Gymnoparia without setae. Chaetoparia covered with setae. Pterotorma dexiotorma and laeotorma well-developed and sclerosed, without apotorma and epitorma. Dexiotorma 1.25X length of laeotorma. Haptolachus with 2 nesium. Crepis absent. Mandibles ( Figs. 18, 19 View Figs ): Asymmetrical. Left cutting region with 3 teeth and right with 2 teeth. Scrobe with 4–5 basolateral setae. Dorsal carina without seta. Dorso-molar area with a group of short setae close to molar surface. Right ventral process smaller than left ventral process. Calyx elongated. Brustia present. Acia well-developed. Stridulatory area absent. Ventral processes with roughness. Maxilla ( Fig. 20 View Figs ): Galea and lacinia fused, slightly separated at the apex; galea with well-developed uncus; lacinia with 3 unci, the 2 distal unci fused basally ( Fig. 21 View Figs ). Stridulatory area formed by a row of 8–10 teeth ( Fig. 22 View Figs ). Labium ( Figs. 23–24 View Figs ): Hypopharyngeal sclerome asymmetrical, strongly developed and sclerosed, left hypopharyngeal lobe with a row of horizontal setae and proximal area of scleroma with a row of vertical and horizontal thick setae ( Fig. 23 View Figs ). Glossa covered by slender setae and robust setae. Subtrapezoidal postmentum with 2 slender setae. Posterior pre- mentum with 2 long setae, anterior prementum with 6 slender setae and 1 lateral seta close to the labial palp ( Fig. 24 View Figs ). Thorax. Spiracles ( Fig. 25 View Figs ): C-shaped, respiratory plate 0.12 mm long, 0.05 mm wide, with 10–12 regular holes across diameter ( Fig. 26 View Figs ). Distance between 2 lobes of respiratory plate similar to dorsoventral diameter of bulla. Pronotum: With irregular sclerosed shield, yellow on the side, surrounded by 15–20 long, medium, and short setae. Dorsum of prothorax with 1 irregular row of long, medium, and short setae. Legs ( Fig. 27 View Figs ): Gradually increase in size from prothorax to metathorax. Each tarsungulus affiliated with 2 proximal setae. Metatarsungulus smaller than preceding tarsunguli. Abdomen: Spiracles on A1 ( 0.09 mm) and A2–8 ( 0.07 mm) of similar size. Spiracular area with one very long seta and 4–6 short, medium, and long setae. Dorsum of A1–6 with 3–4 rows of short, sickle-shaped setae. Raster ( Fig. 28 View Figs ): With 2 parallel, longitudinal palidia with 9–10 pali ( n = 10). Tegillum with 13–16 hamate setae laterally. Septulum bare. Anal opening Y-shaped. Dorsal anal lobe covered with sickle-shaped setae mixed with straight, thin, small setae. Ventral anal lobe with straight, slender setae. Campus with 2 moderately long setae. Barbula with a few long setae.