18 BULLETIN 45, UNITED STATES NATIONAL MUSEUM. 



Tliesr mtsasureinciits inay !>«• <i)iitrii»toil with thoNc of the normal male of iS. cylin- 

 driva from '.'revfs.i, drawu to the same scale: 



That «f the winged and ocellnU-d malt* lu^iiif; 



Thatof tlio wiiiKlexH and uiiocellati-d female Ix'iu;; 



Long. 



61 

 97 



I 



Wide. 



00 



78 



The anomaly in carried still furtluT in the Coylonese S. riflilano, of which I have 

 only 8een two female 8))ecimens, cue of which had fully developed winj^s ami ocelli, 

 whilst the other was winj^le.ss, hut {los.scMsed ocelli. Hut the anomalous characters 

 of the genus are not confined to the females, since Sir S. S. Sannilers cai)tured a 

 wingless male provided with slender antenna' and with three large ocelli, hut en- 

 tirely destitute of wings. 



Mr. Hsiliday's observation on his LabolipH htni(2ita is tht' only case 

 bearing? directly upon i)artlicnogcnsis m the I'roetotrypidic, kno\v,n to 

 me. Jle found the ovaries form each an oblate .spheroid, entirely cov- 

 ered with regular small protuberances, as if they were composed of an 

 agglomeration of globular cells; the sei)arate oviducts, in the short 

 axis of the ovary, of considerable volume, and nearly as long as the 

 transverse diameter of the ovary, united into a short excretory canal; 

 no seminal receptacle was discovered, while in both specimens exam- 

 ined there was apparently a malformation of the malpighiau vessels, so 

 that he could not determine their number with absolute certainty. 



Mr. Haliday considered the form of the ovaries without a parallel 

 among the rest of the Hymenoptera. and the absence of a seminal re- 

 ceptficle, if his observation could be dei)ended upon as exact, most sin- 

 gular, as this appendage is found in form even in the agamous Cynipidai. 



TRANSFORMATIONS OB LIFE HISTORY. 



TIIK EGG.S. 



The eggs of the Proctotrypids known to me are ovate or oblong in 

 shape, with a more or less distinct peduncle at one eiul, and agree well 

 in general with many in the family Ichneumonida', although those in 

 the subfamily l'latygasteriua», on account of the longer i)eduncle, more 

 closely resemble those in the family Cynipida*. 



EMBKVOLOUICAL DEVELflI'MENT. 



Ganin,! 1869, was the first biologist to study the embryological de- 

 velopment of certain proctotrypids — PlatyyaHter, Tckas, etc., while an 

 American biologist, Prof. Ayers,^ has given the embryological de- 

 velopment of a Scelionid, in his paper entitled '' On the Development 



•Ueber der Embryonalhiillc der Hymenopt. und Lei)idopt. Embryonen, St. Pe- 

 tersburg, 1869. 



*Mem. Boston Soc. Nat. Hist., v<d. iii, 1884. This insect is not a true Teleas and 

 is either cue of two insects described iu this memoir, viz., Cacus acanthi or Bary- 

 wnut vcanthi. 



