398 PIIOCEEDINGS OF THE NATIONAL MUSEUM. vol.xxm. 



I. (?) SYRPHOPHAGUS FLAVICLAVUS Howard. 



EncyriiisJlaviolavKS Howakd, Jourii. Linn. Soc. Loud., Zool., XXV, 1896, female.— . 

 Dalla Torre, Cat. Hym., V, 1898, p. 258. 



Hahitat. — West Indies: St. Vincent. 



2. SYRPHOPHAGUS MESOGRAPT^E Ashmead. 



Evcijrtns meaofiraptcv Ashmeaj), Tr. Am. Eut. Soc, XXIIl, 1896, p. 232, femalo and 

 male— Dalla ToiiKE, Cat. Hj-m., V, 1898, p. 261. 



Tyjje.—Qat. Ko. 4754, U.S.N.M. (Ashmead collection.) 



.Habitat. — Florida. j 



Host. — Di[)t. : Mesof/raj^ta 2^oUta Say. 



3. SYRPHOPHAGUS QUADRIMACULATiE Ashmead. 



Pteromalun 4-mavulata'. Ashmkad (part), Tr. Am. YAit. Soc, XIV, 1887, p. 191. 



Type.—i^At. No. 4755, U.S.i^r.M. (Ashmead collection.) 



Hahitat. — Florida. 



Host. — Dipt. : Syrphus rihesri Linnaeus. 



4. SYRPHOPHAGUS MODERATUS Howard. 



Encyrtas moderatus Howard, .louru. Linn. Soc Loud., Zool., XXVI, 1896, p. 152, 

 female.— Dalla Torre, Cat. Hym., V, 1898, p. 261. 



TyjH'.— Gat. No. 475G, TJ.S.KM. ; also in British Museum. 

 Habitat. — West Indies: Grenada. 



5. SYRPHOPHAGUS SUBMETALLICUS Howard. 



Encyrtus siibmetaUicus Howard, Journ. Linn. Soc Lond., ZooL, XXVI, 1896, p. 157, 

 female. — Dalla Torke, Cat. Hym., V, p. 264. 



Type.— Celt. No. 4757, U.S.N.M.; also in British Mus-um. 

 Habitat. — West Indies: Grei^ada. 



6. SYRPHOPHAGUS VECTIUS Walker. 



Encyrtas rec<i»s Walker, Ann. and Mag. N. Hist., XX, 1847, p. 21, male. — Cresson, 

 Syn. Hym. N. A., 1887, p. 239.— Dalla Torre, Cat. Hym., V, 1898, p. 265. 



Habitat. — Florida. 



70. APHIDENCYRTUS Ashmead, new genus. | 



(Type, Encyrlns aphidtphagvs Ashmead.) 



The characters used in my table of genera readily separate this genus 

 from Fseudencyrttis and Epiencyrtus, the only genera, except possibly 

 Ooencyrtus, with which it could be confused. Its resemblance to the 

 last-mentioned genus, lies only in venational cliaracteristics, since the 

 marginal vein is also short, nearly punctifonn; the other characters j 

 mentioned may, however, be depended upon to distinguish it. \ 



All of the S[)ecies falling in this genus, known to itie, are parasitic on 

 Homopterous insects belonging to the family Aphididas. It is also prob- 



