NORTH AMERICAN COLEOPTEKA. 121 



M. inaetilatu.S Lee, Trans. Am. Ent. Soc. xii, November, 1884, p. 28; 

 cimex Allard, Ann. Belg. 1889, p. Ixviii. — Oblong-oval, differing in tlie sexes, color 

 pale blood-red (when recent) or reddish yellow, each elytron with two black 

 spots, surface shining 9 > oi' with subopaque elytra % . Head entirely black, 

 smooth. Antennae black. Thorax broader than long, narrower at apex, sides 

 very obtusely angulate one-third from apex, thence slightly sinuous to base, 

 hind angles acutely rectangular, anterior angles slightly tuberculate, disc convex 

 at sides only, smooth, polished. Elytra oblong and parallel J , or rather broadly 

 oval %, each with two irregularly oval piceous spots placed a third from apex 

 and from base, surface smooth, impunctate. Body beneath and legs black, ab- 

 domen yellow, the last segment piceous 9t surface sparsely fulvo-pubescent. 

 Length .27 — .31 inch. ; 7 — 8 mm. 



Male. — Elytra rather broadly oval with subopaque surface, about one-half longer 

 than wide, lateral margin one-third from apex incised, wrinkled and foveate, 

 lateral margin rather widely explanate. Last ventral segment truncate, the 

 apex sinuate, disc foveate near the edge. 



Female. — Elytra oblong, parallel, polished, rather more than twice as wide as 

 long, margin entire and narrowly prominent. Last ventral oval at tip. entire. 



In this species the male has a broader and more depressed form 

 than any of the species figured by Jacoby, while the female is not 

 very unlike in form a depressed Phyllobrotica. The sexes are thus 

 so unlike that they might readily be supposed to be distinct species. 



Occurs in the southern part of California. 



METACYCL,A Baly. 



Head not large, not deeply inserted, front oblique. Eyes nar- 

 rowly oval, entire. Antennae slender, reaching the tips of the elytra, 

 joint one stout and conical, two half as long, joints 3-11 nearly 

 equal, the fourth a little longer ; labrum transverse, slightly emar- 

 ginate ; maxillary palpi not stout, the last joint as long as the pre- 

 ceding and a little more slender ; prothorax transverse, nan-ower at 

 base than at apex ; scutellum oval, broader than long. Elytra ob- 

 long oval, the epipleurse moderately broad, extending nearly to apex ; 

 prosternum not entending between the coxiB, the coxal cavities open 

 behind. Legs moderate, the tibiae carinate on the outer edge, a ter- 

 minal spur on all the tibipe ; claws broadly appendiculate. 



This genus is remarkable in the great dissimilarity of the sexes. 

 In the male the elytra completely cover the abdomen, and the form 

 is not unlike Cerotoma, while in the female the abdomen is greatly 

 inflated, as in Meloe, and the elytra scarcely cover more than a third 

 of its length. Unaware of the identity of the genera. Dr. LeConte 

 described this one as Gastror/yna, Dr. Baly's Metacycla having been 

 described four years previously. 



TEANS. AM. ENT. SOC. XX. (16) JUNE. 1893. 



