Zagrammosoma intermedium Gordh

(Fig. 25)

Zagrammosoma intermedium Gordh, 1978: 248–250 . Holotype ♀ [examined]. Locality: USA, California, Palo Alto, 35m, 1947, J.W. Tilden, host: Cameraria nemoris (Walsingham) ( Lepidoptera: Gracillariidae). Type depository: USNM type no. 75663.

Diagnosis. The color pattern on the female gaster of Zagrammosoma intermedium is unlike any other species (Fig. 25D). The pattern is similar to Z. centrolineatum, however, the margins of the band are not completely straight, as they are in Z. centrolineatum (Fig. 10D). The wing patterns of Z. buselus and Z. centrolineatum are also similar, however the mesosoma color patterns of both males and females of these two species are very different (Figs 6D, E, 10D, E).

Description. Female - body length 1.65–2.31 mm. Metallic luster on body absent. Scape yellow with black stripe dorsally. Lower face with median stripe absent. Vertex with 2 stripes above compound eye. Gena posteriorly with dark stripes below compound eye. Occiput yellow with 2 dark, vertical stripes. Pronotum with median stripe complete; laterally with 2 black stripes. Prepectus yellow with dark stripe along dorsal margin. Mesoscutum with median stripe complete or incomplete. Mesoscutellum yellow with three dark stripes. Propodeum yellow with black median carina, anterior and posterior margins, and spots laterally. Procoxa and mesocoxa yellow. Metacoxa yellow with darkening basally. Profemur and mesofemur yellow. Metafemur yellow, or with uninterrupted stripe dorsally. Fore wing: basal and cubital bands absent; parastigmal band present, with perpendicular extension less than or equal to that of stigmal apex; stigmal and postmarginal bands present, with perpendicular extension greater than that of stigmal apex; connections from parastigmal band to stigmal band and from stigmal band to postmarginal band absent; broad, medial patch present. Hind wing hyaline. Gaster yellow, with wide longitudinal dark band present dorsally.

Upper ocular sulcus present. Pedicel longer than wide. Funiculars symmetrical: first longer than wide (w:l = 0.5–0.57); second longer than wide (w:l = 0.66–0.68).

Pronotum, in dorsal view, bell-shaped (w:l = 1.41–1.6); 3–4 pairs of setae along posterior margin. Mesoscutum reticulate; small, scattered setae absent or present; intermediate setae present. Mesoscutellum wider than long (w:l = 1.13–1.26); submedian grooves present. Hind tibial spur distinctly shorter than basitarsus. Hind basitarsus longer than second tarsomere or subequal (bst:2 nd = 1.0–1.18). present.

Fore wing l:w = 2.41–2.54. Submarginal vein with 5–7 setae dorsally. Basal fold setose. Cubital fold setose. Admarginal setae present. Uncus originating on stigma by more than own length from stigmal apex.

Male - as female, except: body length 1.44mm (only one male examined); mesoscutum with median stripe interrupted; mesoscutum with small, scattered setae absent; gaster with black spots laterally, median stripe on Gt 3 –Gt 6, and transverse stripes on posterior margins of Gt 4 and Gt 5 (Fig. 25E).

Remarks. Gordh (1978) described the species from one female specimen, reared from Cameraria nemoris (Wasingham) (family). While only five other specimens have been examined, Z. intermedium is valid, as the wing and mesosoma patterns are unique to the species, and is molecularly distinct, recovered sister to Z. centrolineatum (Fig. 2).

Hosts. Lepidoptera: Gracillariidae: Cameraria nemoris (Walsingham) on Vaccinium ovatum (Ericaceae) .

Distribution. Nearctic: USA (CA) (Fig. 22).

Etymology. Intermedius is Latin for intermediate.

Material examined. USA: California: Marin Co., Inverness, 38°06‘6“N, 122°51‘36“W, host: Cameraria nemoris, host plant: Vaccinium ovatum [3♀ 1?, EMEC: EMEC 84292–95]. Riverside Co., Hwy 74, Garner Vly., Fobes Ranch Rd., 1372m, 33°38‘41“N, 116°37‘34“W, 20.vi.2014, R. K. Perry, Sweep, RP14/010 [1♁, UCRC: UCRCENT312377 (D4115)].