786 Pomona College Journal of Entomology 



Body black, abdomen without dorsal dark markings, not 



purvelent. saliciti (Harris) 



M. rufidus (Davidson). On Salix sp., in the vic'lnity 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. Ec. Ent., II, p. 300, 1909. 



Pterocomma Buckton 

 Syns. Cladobius Koch 



Aphioides Passerini 

 Aristaphis Kirkaldy 

 Type P. pilosa Buckton 

 No members of this genus reported from California. 



Melancxantherium rufulus Davidson 

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

 scription. 



WINGED VTViPAEOUS FEMALE (Figure 249, A) 



Length 3.25 mm., width of the mesothorax 0.95 ram., 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 slightl.y powdery. Prevailing color — 

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

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

 than long, broad between antenna?, dusky amber. Eijrs — Dark red with terete 

 tubercles. Antennae— {Figure 250, 1 and 2). As long as the head and thorax, 

 imbricated, hairy articles I and II dusky. III duslrv })rown 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, O.fi mm. ; IV, 0.38 mm. ; V, 

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

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

 and wider, III the longest article, IV and V equal or nearly so, in some cases 

 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 

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

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

 slightl.y beyond the third eoxa% transparently light with the extreme tip dark. 

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

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

 amber, when pruino.se with a lateral dorsal darker band parallel to tlie sides, 

 ventral surface yellowish. Mesothorax — 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 



