136 



PSYCHE. 



[November 1S97. 



a little longer than thick, the second and 

 third siibequal, about as long as thick, the 

 following wider than long; club o%'ate 3- 

 jointed. 



Thorax with the pronotum transversely 

 narrowed, the mesonotum a little more than 

 twice as wide as long, with the parapsidal 

 furrows indicated only anteriorly by two 

 short convergent impressed lines which 

 become obsolete at about the middle of the 

 mesonotum; scutellum convex, with the 

 axillae about as wide from each other as 

 their width at base; metathorax produced 

 into a subglobose neck, with curved lateral 

 folds but without a median carina or spirac 

 ular furrows, the spiracles small, rounded 

 Wings hyaline, the nervures pale yellowish 

 the marginal and postmarginal veins sub 

 equal, one-third longer than the stigmal 

 Abdomen ovate, scarcely as long as the 

 thorax, the second segment (first body seg- 

 ment) occupying two-fifths of its entire 

 length, with a large fovea at base above, the 

 third segment above one-third the length of 

 the second, the fourth, fifth and sixth very- 

 short and graduall3' shortening, the seventh 

 and eighth much longer. 



Bred May, 1S95, from infested stalks 

 of wheat collected March 27. 

 Subapteroiis form. 



$. Length 1.4 mm. Bronze green, the 

 head in front blue-green; scape and pedicel 

 brownish-yellow, the flagellum filiform, dark 

 brown or brown-black, clothed with a fine 

 pale pubescence; palpi pale; mandibles 4- 

 dentate, ferruginous; legs, except coxae, 

 stramineous; coxae metallic; abdomen aene- 

 ous black, brassy towards base. 



Head and thorax squameously punctate, 

 the head transverse wider than the thorax, 

 about 34 times as wide as thick antero-poste- 

 riorly, the occiput concave; eyes subovate; 

 antennffi 13-jointed, with 2 ring-joints, in- 

 serted near the middle of the face, the scape 

 about half as long as the flagellum, the ped- 



icel obconical, a little longer than the ring- 

 joints and the first joint of funicle united, 

 the funicle joints all a little longer than 

 thick, the club ovate, 3-jointed 



Thorax with the parapsidal furrows indi- 

 cated only anteriorly, the pronotum short, 

 rounded anteriorly; scutellum subconvex, 

 with a subobsolete cross-furrow before apex ; 

 metathora.x with a subglobose neck, without 

 carinae or spiracular sulci, the spiracles very 

 small. Wings abbreviated, narrowed, not 

 reaching much beyond the middle of the ab- 

 domen, the tegulae yellowish. Abdomen 

 broadly oval, polished, impunctate, de- 

 pressed, wider than thorax and usually but 

 not always truncate at apex, by the retrac- 

 tion of the terminal segments; second seg- 

 ment occupying about half the whole surface 

 or nearly so, the following segments short 

 and gradually shortening toward tip. 



Hab. — Poitou and variotis parts of 

 the Vendue in France. 



This has also been bred by Dr. 

 Marchal, from his Cecidoinyia ( Oligos- 

 tropkus) avenae., infesting oats. 



The species comes nearest to Bocoto- 

 mus {Aferiszts) subapterus Riley, but 

 is readily distinguished from it by the 

 metallic coxae, darker flagellum, the 

 longer funicular joints and by its broader 

 more depressed abdomen. 



It seems quite distinct from Merisus 

 microptera Lind., Bull. Soc. Imp. 

 Nat. Moscow, 18S7, p. 1S2. 



(4) Holcaeus cecidomyiae n. sp. 



5. — Length 2.5 mm. Head and thorax 

 olive-green, squameously punctate; scape, 

 trochanters, knees, tibiae and tarsi, except 

 last joint honey-yellow; pedicel bluish; 

 flagellum black, clothed with a short, black- 

 ish pubescence; wings hyaline; abdomen 

 aeneous, the large second segment, except 

 the apical margin, blue. 



