half of sclerite with a broad brown stripe with 3 light spots along the frontal 

 sutures; posterior spot consisting of two fused spots, larger than the others; 

 posterior part light, without dots. Anterior -margin setae of sclerite thin; 

 intermediate seta longer than the others, strong; median seta situated 

 nearby, slightly shorter and thinner; lateral seta light, curved, situated in 

 about the middle between intermediate seta and anterior angle. Anterior 

 and middle frontal setae short, thin and situated on light spots; posterior 

 frontal seta situated posterior to the lateral indentation, dark, directed up- 

 ward, the longest seta of the sclerite. 



Lateral to the frontal sutures, beginning from the light periocular area 

 and along the coronal suture are grayish brown dorsal stripes, each with 

 3 large, light yellow spots; the dorsal stripes extend almost the whole width 

 of the head in dark larvae; they are adjacent to the coronal suture and 

 extend posteriorly almost /$ of its length; the stripes are much narrower 

 and touch only near the bifurcation of the frontal suture in light larvae; 

 a narrow dark stripe further posteriorly along the coronal suture. Lateral 

 stripes absent. Head light yellow or slightly brownish, without ventral 

 pattern; gular suture long; gula short, broad, triangular. 



FIGURE 586. Ecnomus tenellus Ramb. Full-grown larva, lateral 



Setae of large lateral sclerites brown or light brown. Seta 9 longer than 

 the others, situated near the anterior margin of the periocular area, near 

 the frontal suture; seta 11 situated nearby, little marked; seta 7 large, 

 situated near the anterior margin, between the dorsoventral articulation of 

 the mandibles; light seta 10 situated laterally, near the edge of the periocular 

 area thin and small; the long setae 12 and 14 posteriorly and slightly 

 laterally to the eye; thin setae 15 and 16 and the small light seta 17, which 

 is situated near the suture, situated slightly further posterodor sally. Seta 13 

 absent. 



Anteclypeus whitish yellow, broad, with rounded anterior angles. 



Labrum (Figure 588) with rounded anterior angles and a deep median 

 indentation, which is twice as broad as long. Dorsal sclerite light yellow, 

 covering almost the whole upper surface; membranous anterior margin 

 very narrow, little marked; median depression with a row of straight, short, 

 curved hairlike spinules; indentation tuberculate; membranous margin with 

 a row of short light hairs laterally. Median pit in posterior half of labrum 



466 



