142 MAIXK AGRICULTURAL KXI'ERIMENT STATION. I912. 



OAJ, BSXH; E. absoluta, OAJ, JMA, BSNH; E. capillata, OAJ, 

 AAIXH: E. obediens, JMA, AMNH; E. attrita, OAJ, AMNH, CU; E. 

 repanda, OAJ, BSNH, CU ; E. absurda, OAJ; E. casta, OAJ, AMNH. 



Dynatosoma nigrina, OAJ ; D. placida, OAJ. 



Opistholoba ocellata, OAJ, CU. 



Mycothera paradoxa, OAJ; M. mitis, AMNH; M. recta, OAJ; M. 

 var. praenubila, OAJ, AMNH, JMA; M. impellans, OAJ, BSNH, 

 JMA. 



Mycetophila jucunda, OAJ ; M. perita, OAJ, CU, AMNH ; M. fastosa, 

 OAJ; M. falcata, OAJ, JMA; M. lenis, OAJ; M. anomala, OAJ, 

 AMNH; M. foecunda, OAJ, A^IXH, CU, JMA; M. imitator, OAJ, 

 CU, AMNH; M. perlonga, OAJ; M. pectita, OAJ, JMA; :M. lassata, 

 CU; M. lenta, OAJ, AMNH; M. fatua, OAJ, JMA; M. edura, OA;, 

 AMNH; M. exusta, OAJ, JMA, CU; M. jugata, OAJ; M. extenta, OAJ, 

 CU; M. edentula, OAJ, BSNH; M. socia, OAJ, CU. 



Sciara. All types in my collection. Paratypes as follows : S. dives, 

 JMA; S. futilis, AMNH; S. imitans, JMA; S. hastata. CU; S. jucmida, 

 CU; S. mutua, CU ; S. parilis, E. S. Tucker; S. nigricans, CU, E. S. 

 Tucker; S. varians, JMA; S. trivialis, AMNH. 



Zygoneura flavicoxa, OAJ. 



In the body of the work the type locality is indicated by an exclama- 

 tion point. 



Plate. 



Details of hypopygia. Dorsal aspect of left half rinless otherwise 

 noted. Abbreviations used the same as in Part III. Figs. 24 to 29, 

 Phronia species; figs. 31 to 57 Exccliia species. 24 P. producta x 170. 

 25, insiilsa, x 75. 26, i<cnusta, x 60. 2j. difficilis, x 60. 28, siiiiilis. x 300. 

 29, rustica, var. a, x 60. 30, Tclmaphilus ncbnlosa, x 85. 31, E. perspicua, 

 X 60. 32, umbratica, x 35. 32,, nugax, x 60. 34, nexa, x 60. 35, abrupta, 

 X 35- 36. canalicula, x 35. 2,7, cincinnata, x 35. 38, quadrata, x 35. 

 39, satiafa, x 35. 40, ditfOj va of apex of median margin. 41, nugatoria, 

 X 35. 42, nath'a, x 35. 43, intcrrupta, va of apex of median margin , 

 after Lundstrom. 44, palmafa, x 60 va. 45. fungorum va, after Lund- 

 strom. 46, assidua, x 45. 47. auxiliaria, x 60. 48, bcllula, va, x 60. 49, 

 bclla, X 35. 50. captiva. x 35, right hand members. 51, absoluta, x 60, b' 

 is la of apex of b. 52, capillata, x 60, latero-dorsal aspect. 53, obediens, 

 X 35. 54, attrita. x 35, V la of b. 55, repanda, x 60. 56. absurda. x 60. 

 57, casta, X 60. 58, Dyiiatosoina nigrina, la of forceps, x 35. 59, D. 

 fuh'ida. la of forceps, x 35. 60, Opistholoba ocellata, la of forceps, x 30. 

 61, Epicypta trinotata, x 35. 



Plate. 



Details of hypopygia. Figs. 62 to 67 Mycothera; figs. 68 to 95 

 Mycetophila ; fig. 96 Sceptonia ; figs. 97 and 98 Zygomyia. 62, Mycothera 

 paula, va, x 35. 63, paradoxa, la of ovipositor, x 60. 64, mitis, x 60, la. 

 65, recta, x 170, la. 66, fcnestrata, x 85, da. 67, impellans, x 170, la. 

 68, Mycetophila cxstincta. x 85. 69, jucunda, x 85, la. 70, perita, x 45, da, 

 b'^b, X 85 la. 71, fastosa, x 60 da. 72, punctata forceps, x 60, da. 73, 

 falcata. x 85, s. da. i, va. 74, nnctica, x 60, s, da, i, va. 75, mutica var. 

 a. X 85, va. 76, lenis, x 85, i, va, s, da. 77, anomala, x 35, la. 78, 



