186 Mr. J. Hardy on the effects produced 



pleuris, ventre, lateribusque abdominis argenteis ; pedibus elongatis 

 cinereis, argenteo-micantibus ; alis subamplis, subdenigratis, dense 

 cinereo-fimbriatis, nervo costali crasso, obscuro, angulo nervi furcati 

 rectiore ; antennis nigris, 1 9 ?-articulatis, articulis confertis, dense 

 setigeris, duobus primis, ultimoque exceptis, subcylindricis ( ? ) ; 

 vel 20?-articulatis, duobus primis, ultimoque elongato oblongo-ovato 

 exceptis, pedicellato-oblongo-subquadratis, confertim pilis verticil- 

 latis obsitis (c?) ; halteribus albis, capitulo dilatato. Corp. long, 

 lin. \\ ; alar. exp. lin. 3. 



4. C. Rosarum ; nigricans, minuta, nitida, vix subcinereo micans ; 

 thoracis margine posteriori, alarum radicibus, scutelli apice, meta- 

 tboraceque interdum carneis ; abdomine cameo, segmentis ad bases 

 nigricantibus ; ventre notis nigris asperso ; pedibus elongatis graci- 

 libus, albo-argenteis, subcinereisque variantibus ; alis mediocribus 

 abdomine brevioribus, denigratis, crebriter atro-cinereo pubescen- 

 tibus et fimbriatis, nervo costali, primoque longitudinali, subni- 

 gris, angulo nervi furcati subrecto ; antennis brevibus, gracilibus, 

 nigris, 14-articulatis, articulis subcrebre pilis longis verticillatis ob- 

 sitis, Imo cyathiformi, 2do rotundato, 3io ovato breviter pedi- 

 cellato, succedentibus oblongo-ovatis, confertis, ultimo tamen bre- 

 viter ovato ; halteribus albis, modice elongatis et clavatis. Long. 

 Corp. lin. 1 ; alar. exp. lin. 2. $ . 



5. C. rhodophila ; pallida, minuta, gracilis ; capite atro ; thoracis 

 dorso fusco-cinereo, lineis tribus pilorum griseorum notato, margine 

 posteriori, scutello, metathoraceque flavidis, subcarneisve ; abdo- 

 mine curtato pallide flavo ; pedibus elongatis, gracilibus, subflavis, 

 extrorsum cinerascentibus ; alis sublatis, hyalinis, purpureo-iridis- 

 centibus, subtiliter minus confertim pubescentibus et fimbriatis, 

 nervo costali, primoque longitudinali distinctis, subdenigratis, an- 

 gulo nervi furcati subacuto ; antennis nigris, basi flavidis, graci- 

 libus, 1 8-articulatis, articulis, Imo et 2do brevioribus, crassiori- 

 busque, subcyathiformibus, succedentibus cylindricis, gradatim lon- 

 gitudine et latitudine decrescentibus, idtimo ovato, breviter discre- 

 teque pilis verticillatis obsitis ; halteribus albis. Long. corp. lin. ^ ; 

 alar. exp. lin. 1-^. ^ . 



Obs. Mas adhuc exilior evasit. 



About the 2nd of July the leaves at the summits of the twigs 

 of Helianthemum vulgare, in this vicinity, were collected into 

 bunches, but not so firmly compacted as those of the sallow. At 

 the bases of the leaves numbers of the larvae of a Cecidomyia 

 were congregated, to whose operation the deficient extension of 

 the shoots was owing. The grubs were narrow, slightly orange, 

 with the centre more dusky, somewhat truncate, and quadritu- 

 berculate behind; the attenuated anterior end with a pair of 

 bristle-like horns and a dusky spot ; a testaceous dagger-like line 

 on the breast, and a few hairs on the segments, with five or six 

 apical ones. Length 1 line. From these I reared a single spe- 

 cimen of the midge, which may be named 



