190 



PSYCHE 



[March 189!; 



Discal band divided centrally ... 5 



3. Discal band with two dark yellow 



spots within crinis Druce 



Discal band not so marked .... 4 



4. Thorax with 4 black dots centrally . 



delicata Moschl. 

 Thorax without black spots .... 



admirabilis Cram. 



5. Thorax with 4 black spots centrally . 



dares Druce 

 Thorax without black spots .... 6 



6. Fore wing white . . . ortus Schaus 

 Fore wing yellow . . . citrina Druce 



7. Discal band separated from base by a 



median yellow space 8 



Basal half of fore wing brownish 

 fawn color lemba Druce 



8. Discal band produced along the costa 



to apex 9 



Discal band not produced along costa ; 

 four black dots on thorax .... 



pic/iesetisis Dyar 



9. Center of thorax deep yellow; no 



spots critheis Druce 



Thorax white, spotted with roseate 

 brown herois Schaus 



Of the other species listed by Kirby, citra- 

 rius Dogn. is probably congeneric with 

 Mazaeras if sea Druce (Zatrephes according 

 to Kirby), which differs generically from 

 Idahis in having vein 6 of secondaries pres- 

 ent, on a very long stalk with vein 7; dimas 

 Cr. looks like Sciathospunctigera Cr. (Mega- 

 lopygidae), except for the coloration of the 

 body, and the other species rufoviridis 

 Walk., enervis Schaus, lavinia Druce, larissa 

 Druce, alba Druce and erythronotata H.-S. 

 also differ so much in pattern of marking 

 from Idalus that I think they will be found 

 to differ in structure as well, and I have not 

 included them in the synopsis. The de- 

 scription of Uiieosus Walk, has not been ex- 

 amined. 



/. citrina Druce, included above has been 

 removed by Mr. Schaus to his new genus, 

 Pseudalus, which differs m having the $ 



antennae pectinate. The venation seems to 

 be the same and I have provisionally'retained 

 the species under Idalus. 



TWO NEW SCALE-INSECTS QUARAN- 

 TINED AT SAN FRANCISCO. 



Mr. Alex. Craw has just sent me another 

 lot of Coccidae detected by him on plants 

 which were about to be landed at San Fran- 

 cisco, and among them I find two very dis- 

 tinct new species, which are herewith 

 described. 



Diaspis crawii, n. sp. — • ? scale nearly 3 

 mm. diam., circular, slightly convex, white; 

 exuviae subcentral to sublateral, rather large, 

 but inconspicuous, being of a very pale 

 ochreous color. From one-quarter to one 

 half of first skin overlapping second. 



? . After boiling in caustic soda colorless, 

 the lobes remaining light brown. The form, 

 after boiling, is unusually elongate. Median 

 lobes rounded, radiately striate, only moder- 

 ately' large, their margin rather inclined to 

 be irregularly crenate. Between the median 

 lobes is a wide space, equal to about one- 

 third of the breath of a lobe. At the outer 

 side of each median lobe are a bristle and a 

 spine-like plate (gland-hair) ; then follows the 

 second lobe, consisting of three large sub- 

 equal lobules, the first lobule somewhat nar- 

 rower than the other two ; a spine-like plate 

 between the second and third lobules; after 

 the second lobe is a large spine-like plate; 

 then comes the third lobe, consisting also of 

 three large lobules, the first the smallest, the 

 second the largest, a small spine-like plate 

 between the second and third ; after the third 

 lobe comes a large spine-like plate; then 

 after a short interval the fourth lobe, consist- 

 ing of three very broad low lobules, the first 

 low conical, tlie second only gently convex, 

 and serrate with five teeth, the third almost 

 flat, and similarly serrate ; then follow a 

 bristle and a large spine-like plate, and after 

 them a couple of broad low processes repre- 



