English: Gasterophilus larva, female dorsal and lateral. Genus characteristics: 1- Large rasping mouthparts are prominent. 2- Larva has bands of large backward pointing spines around the full circumference of most segments; there are no fleshy projections. 3- Posterior spiracles form oval plates, with 3 elongated curved openings on each plate; spiracles are within a deep depression in the last segment (anterior spiracles usually visible as small bunches of protruding tissue). 4- Abdomen of female is long and extends in a fold underneath the main body. 5- Antenna has large arista without setae. 6- Mouthparts are vestigial. 7- Wings have dark patches; vein 4 of the wing reaches directly to the trailing edge of the wing. 8- Thorax and abdomen are covered with a dense covering of fine setae which are dark brown or yellow in a patchy pattern; eyes are dark brown.