NO. 3551 EUCHROMIUS — CAPPS 3 



Euchromius ocelleus (Haworth) 



Figures 4, 8; Plate 1 (fig. 2) 



Palparia ocellea Haworth, 1811, Lepidoptera Britannica, vol. 3, p. 486. 



Eromene texana Robinson, 1870, Ann. Lye. Nat. Hist. New York, vol. 9, p. 155. 



Male (pi. 1: fig. 2). — Alar expanse 18-24 mm. Forewing: Upper 

 surface coloration somewhat variable; sordid white, ochreous white 

 to pale brown, with brownish or fuscous irroration distinct; two 

 ochreous transverse postmedial bands, sinuate or concave inwardly, 

 margined with silvery white or gray; two short, oblique bars of similar 

 color adjacent to apex; terminal dots blackish, margined outwardly 

 with silvery metallic scales; a narrow whitish patch adjacent to ter- 

 minal dots with a thin brownish line midway between the dots and 

 termination of the irrorated area. Hind wing subhyaline, sordid 

 white or with some pale ochreous brown suffusion, without marldngs, 

 or with a thin testaceous terminal line. 



Genitalia (fig. 4): Uncus rather slender, length about equal to that 

 from receptacle to tip of the gnathos. Harpe broad; costa serrate, 

 basal process triangular distally, hook from near base of the process. 

 Aedeagus with a rather extensive series of short, stout, spinelike 

 cornuti and basad an elongate patch of small, slender spines. 



Female, — Alar expanse 17-26 mm. Similar to male in color and 

 maculation. 



Genitalia (fig. 8): Ostium rather narrow, weakly scobinate, ventral 

 margin straight or nearly so; ductus bursae long, with longitudinal 

 grooves, spinulation inconspicuous; distance from ostium to origin of 

 ductus bursae about equal that from ductus seminalis to tip of the 

 bursa copulatrix; two subequal signa, elongate, scobinate, and ridge- 

 like. 



Larva. — Arrangement of body setae typical of a crambid. Pro- 

 thorax with two setae on prespiracular shield; group VI bisetose. 

 Meso- and metathorax with group VI unisetose. Abdominal proleg- 

 bearing segments (3-6) with seta IV approximate to V, on same 

 pinaculum and under the spiracle. Ninth abdominal segment with 

 paired setae II on same pinaculum; setae I approximate to seta III 

 and on same pinaculum; setae IV and V absent, only seta VI of this 

 group present. Crochets on abdominal prolegs in a complete ring, 

 irregularly triordinal in length, weaker outwardly. 



Mature larva 18-20 mm. long. Head: Pale amber with some 

 brownish reticulation; ocellar pigmentation blacldsh, extending from 

 oceUus I to ocellus V, posterior margin of pigmentation tangent to 

 anterior margin of ocellus VI; without fuscous pigmentation at lateral 

 incision of hind margin of head. Thorax: Prothoracic shield amber, 

 with some brownish suffusion and a few dark fuscous patches, the 

 most conspicuous one posterior to and slightly below level of base of 



