432 STATE BOARD OF AGRICULTURE. 



A large number of a small, shining blue chalcid fly were reared from the 

 coccids. M.V. Jj.O. llowax-d has na.med this Pachyneio'onaUiscuf a. He writes 

 me that the only recorded instance of the rearing of a species from this genus 

 which he can find, is the case of P. aphidis Bouche, bred by Reinhard from 

 an Aphis. 



The following is the original description of the genus, kindly sent me by 

 Mr. Howard : 



GENUS VIII. PACHTNEUROX, AVALKEE. 



Caput magnum, thorace latius; oculi mediocres; maris antennae filiformes,. 

 13 articulate; lus elongatus; 2us cyathiformis, subarcuatus; 3ns et 4us 

 minimi; 5us et sequentes ad lOum aequales, lineares; clava elongata acum- 

 inata, articulis 9 "^ et 10"^ longitudine a3qualis; fern antennae subclavata?, 

 corporis dimidio longitudine fequales; articuli post 5um longitudine decre- 

 scentes ; clava elongato-ovata ; mandibula3 arcuatae, dentibus 4 acaminatis 

 arniatae; denies 2 interni niinuti, approximati; maxillae elongatae, externe 

 ciliatae ; palpi maxillares filiformes; articuli lus et 2us aequales; 3 us paullo 

 lougior ; 4us elongatus, acuminatus; mentum elongatum, angustum; labium 

 latum, transverse lineaLum, antice rotundatums; palpi labiales articulis 

 subaequalibus 3° acuminato; prothoracis scutellum brevissinium ; meso- 

 thoracis scutum breve ; suturae laterales vix conspicuae ; paraptera et epimera 

 majuscula; scutellum sat magnum, acrinatum; petiolus brevissimus ; mai'is 

 abdomen elongato-ovatum, depressum ; segmentuni 2um elongatum ; sequen- 

 tia breviora; Jem abdomen fere rotundum, supra depressum, subtus con- 

 vexum; pedes graciles ; tibiae rectae; alae anticae nervus solitus qua cum 

 costa concurrit incrassatus. | Entomological Magazine Vol. 1 (1833) p. 380. 



Pachyneurou (tUiscuta Howard is shining blue, with legs, except femora, 

 which are dark, antennae and eyes light. The length ia 2 mm. (.08 of an 

 inch). The head is about half as long as the thorax, while the antennas, 

 thorax, and abdomen are about equal length. The wings are as long as thorax 

 and abdomen together, while the ovipositor is two-thirds as long as the 

 abdomen. The antennas are thirteen jointed. The 1st is long curved, 2nd 

 short curved, enlarging towards tip, 3rd and 4tii small, 5th to 10th equal in 

 size and length groved longitudinally, and slightly separate. The last three 

 are contiguous, forming the club which tapers to tip. The head is deeply 

 emarginate posteriorly. 



The costal vein of the anterior wing has a break just beyond which it is 

 decidedly broader as far as the branch, which is as long as the broad portion 

 and knobbed. Tiie costal vein of the secondary wing has an angle at its 

 middle, which points forward. The wings are very hairy except at base where 

 they are nearly bald, and they are margined with coarser hairs. The abdomen 

 is peduncled. The male differs little from tlie female, except in the sexual 

 organs. 



We also found the pupa of a heteropteron feeding on the eggs. This insect 

 is only a mm. in length, has red eyes, four jointed antenna?, and is of a yellow 

 color. 



We discovered the larva of a lady-bird beetle, and of a syrphus fly feeding 

 upon the eggs. Many of tlie scales are also attacked by a small white fungus, 

 which appears as a small spike, several of whicli will be found on a single 

 scale. All such scales failed to develop to maturity, and failed to produce 

 eggs. These several enemies will, of course, serve to liold this pest in check. 



