786 Pomona College Journal op Entomology 



Body black, abdomen without dorsal dark markings, not 



purvelent. saliciti (Harris) 



M. rufulus (Davidson). On Salix sp., in the vicinity of Stanford Uni- 

 versity, Palo Alto, Cal. Jr. Ec. Ent., II, 301, 1909. 



M. saliciti (Harris). On Salix sp., in the vicinity of Stanford University, 

 Palo Alto, Cal., Davidson. Jr. Ee. Ent., II, p. 300, 1909. 



Pterocomma Buckton 

 Syns. Cladobius Koch 



Aphioides Passerini 

 Aristaphis Kirkaldy 

 Type P. pilosa Buckton 

 No members of this genu.s reported from California. 



Melanoxantherium rufulus Davidson 

 1909 Cladoobins refulus Davidson. Jr. Ec. Ent. II, pp. 300-301. De- 

 scription. 



WINGED VIVIPAROUS FEMALE (Figure 249, A) 



Length 3.25 mm., width of the mesotliorax 0.95 mm., width of the 

 abdomen 1.15 mm., wing expansion 9 mm. This is not the largest specimen. 

 Davidson gives the following measurements: Length of body 3.8 mm., 

 expanse of wings 11.25 mm. Body — Rather broad and flat, large, entirely 

 covered with rather long fine hair, often slightly powdery.. Prevailing color — 

 Dark grayish-brown or gray-ground color brown, covered with fine white 

 powder giving it the gray color. Head — Small, widest at the base, much wider 

 than long, broad between antennte, dusky amber. Eyes — Dark red with terete 

 tubercles. A^itennae— {Figure 250. 1 and 2). As long a-s the head and thorax, 

 imbricated, hairy articles I and II du.sky. III dusky brown with yellow base, 

 IV dusky white with lighter base, V and VI dusky or dark throughout. 

 Lengths of articles : I, 0.09 mm. ; II, 0.07 mm. ; III, 0.6 mm. ; IV. 0.38 mm. ; V, 

 0.38 mm.; VI, 0.55 mm. (spur 0.33 mm.) ; total, 2.09 mm. antenn;^ of one of 

 the largest insects). I and II are nearly equal with the former, always longer 

 and wider, III the longest article, IV and V e([ual ur nearly so, in some eases 

 IV is longest, in others V is longest, VI with spur much longer than the base, 

 but not over one and one-third times as long. III with from eleven to thirteen 

 large circular sensoria, V with one near the apex, and VI with one large 

 and four or five small sensoria in the process. Rostrum — Reaching to or 

 slightly beyond the third coxiB, transparently light with the extreme tip dark. 

 Prothorax — As long as the head and much wider at tlie base, with distinct 

 lateral tubercles (Figure 250, 4) just back of the middle, greenish or dusky 

 amber, when pruinose with a lateral dorsal darker band parallel to the sides, 

 ventral surface yellowish. Mesotliorax — Deep amber, front median lobe and 

 scutellar lobe lighter than the ground color, side muscle lobes dark, nearly 

 black. All lobes well developed, ventral surface distinctly lobed — lobe on 



